#VU42853 Input validation error in Glibc - CVE-2012-0864

Vulnerability identifier: #VU42853

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-0864

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Glibc
Universal components / Libraries / Libraries used by multiple products

Vendor: GNU

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Integer overflow in the vfprintf function in stdio-common/vfprintf.c in glibc 2.14 and other versions allows context-dependent attackers to bypass the FORTIFY_SOURCE protection mechanism, conduct format string attacks, and write to arbitrary memory via a large number of arguments.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Glibc: 2.14

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External links
https://rhn.redhat.com/errata/RHSA-2012-0393.html
https://rhn.redhat.com/errata/RHSA-2012-0397.html
https://rhn.redhat.com/errata/RHSA-2012-0488.html
https://rhn.redhat.com/errata/RHSA-2012-0531.html
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=7c1f4834d398163d1ac8101e35e9c36fc3176e6e
https://sourceware.org/ml/libc-alpha/2012-02/msg00023.html
https://www.phrack.org/issues.html?issue=67&id=9#article
https://www.securityfocus.com/bid/52201
https://bugzilla.redhat.com/show_bug.cgi?id=794766

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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.