#VU45137 Permissions, Privileges, and Access Controls in Glibc - CVE-2011-1095

Vulnerability identifier: #VU45137

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-1095

CWE-ID: CWE-264

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 execute arbitrary code.

locale/programs/locale.c in locale in the GNU C Library (aka glibc or libc6) before 2.13 does not quote its output, which might allow local users to gain privileges via a crafted localization environment variable, in conjunction with a program that executes a script that uses the eval function.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Glibc: 1.00 - 2.12.1

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External links
https://bugs.gentoo.org/show_bug.cgi?id=330923
https://openwall.com/lists/oss-security/2011/03/08/21
https://openwall.com/lists/oss-security/2011/03/08/22
https://openwall.com/lists/oss-security/2011/03/08/8
https://secunia.com/advisories/43830
https://secunia.com/advisories/43976
https://secunia.com/advisories/43989
https://secunia.com/advisories/46397
https://security.gentoo.org/glsa/glsa-201011-01.xml
https://securitytracker.com/id?1025286
https://sources.redhat.com/bugzilla/show_bug.cgi?id=11904
https://sourceware.org/bugzilla/show_bug.cgi?id=11904
https://sourceware.org/git/?p=glibc.git;a=patch;h=026373745eab50a683536d950cb7e17dc98c4259
https://www.mandriva.com/security/advisories?name=MDVSA-2011:178
https://www.redhat.com/support/errata/RHSA-2011-0412.html
https://www.redhat.com/support/errata/RHSA-2011-0413.html
https://www.securityfocus.com/archive/1/520102/100/0/threaded
https://www.vmware.com/security/advisories/VMSA-2011-0012.html
https://www.vupen.com/english/advisories/2011/0863
https://bugzilla.redhat.com/show_bug.cgi?id=625893
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12272

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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.