Information disclosure in Linux kernel

1) Information disclosure

EUVDB-ID: #VU42884

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-3231

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The llc_ui_recvmsg function in net/llc/af_llc.c in the Linux kernel before 3.9-rc7 does not initialize a certain length variable, which allows local users to obtain sensitive information from kernel stack memory via a crafted recvmsg or recvfrom system call.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.9

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:3.9:*:*:*:*:*:*:*

External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c77a4b9cffb6215a15196ec499490d116dfad181
https://lists.fedoraproject.org/pipermail/package-announce/2013-April/103750.html
https://lists.fedoraproject.org/pipermail/package-announce/2013-May/104480.html
https://lists.opensuse.org/opensuse-security-announce/2013-07/msg00016.html
https://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
https://lists.opensuse.org/opensuse-updates/2013-12/msg00129.html
https://rhn.redhat.com/errata/RHSA-2013-1645.html
https://www.mandriva.com/security/advisories?name=MDVSA-2013:176
https://www.openwall.com/lists/oss-security/2013/04/14/3
https://www.ubuntu.com/usn/USN-1837-1
https://github.com/torvalds/linux/commit/c77a4b9cffb6215a15196ec499490d116dfad181
https://lkml.org/lkml/2013/4/14/107

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.