#VU43085 Information disclosure in Linux kernel - CVE-2012-4530

Vulnerability identifier: #VU43085

Vulnerability risk: Low

CVSSv4.0: 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:P/U:Clear]

CVE-ID: CVE-2012-4530

CWE-ID: CWE-200

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

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

The load_script function in fs/binfmt_script.c in the Linux kernel before 3.7.2 does not properly handle recursion, which allows local users to obtain sensitive information from kernel stack memory via a crafted application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 3.0 - 3.0.44, 3.1 - 3.1.10, 3.2 - 3.2.30, 3.3 - 3.3.8, 3.4 - 3.4.24, 3.5.1 - 3.5.7, 3.6 - 3.6.8, 3.7

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External links
https://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b66c5984017533316fd1951770302649baf1aa33
https://lists.opensuse.org/opensuse-security-announce/2013-04/msg00018.html
https://rhn.redhat.com/errata/RHSA-2013-0223.html
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.7.2
https://www.openwall.com/lists/oss-security/2012/10/19/3
https://bugzilla.redhat.com/show_bug.cgi?id=868285
https://github.com/torvalds/linux/commit/b66c5984017533316fd1951770302649baf1aa33

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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. However, proof of concept for this vulnerability is available.