Information disclosure in Linux kernel

1) Information disclosure

EUVDB-ID: #VU42996

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2012-6549

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 isofs_export_encode_fh function in fs/isofs/export.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel heap memory via a crafted application.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.0 - 3.5.6

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:3.0.9:*:*:*:*:*:*:*

External links

https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fe685aabf7c8c9f138e5ea900954d295bf229175
https://lists.opensuse.org/opensuse-security-announce/2013-07/msg00018.html
https://www.mandriva.com/security/advisories?name=MDVSA-2013:176
https://www.openwall.com/lists/oss-security/2013/03/05/13
https://www.ubuntu.com/usn/USN-1809-1
https://www.ubuntu.com/usn/USN-1811-1
https://www.ubuntu.com/usn/USN-1812-1
https://www.ubuntu.com/usn/USN-1813-1
https://www.ubuntu.com/usn/USN-1814-1
https://www.ubuntu.com/usn/USN-1829-1
https://github.com/torvalds/linux/commit/fe685aabf7c8c9f138e5ea900954d295bf229175
https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.6.bz2

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.