Vulnerability identifier: #VU45488

Vulnerability risk: High

CVSSv3.1: 8.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2010-3847

CWE-ID: CWE-59

Exploitation vector: Network

Exploit availability: Yes

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.

elf/dl-load.c in ld.so in the GNU C Library (aka glibc or libc6) through 2.11.2, and 2.12.x through 2.12.1, does not properly handle a value of $ORIGIN for the LD_AUDIT environment variable, which allows local users to gain privileges via a crafted dynamic shared object (DSO) located in an arbitrary directory.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Glibc: 1.00 - 2.12.1

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External links
http://seclists.org/fulldisclosure/2010/Oct/257
http://seclists.org/fulldisclosure/2010/Oct/292
http://seclists.org/fulldisclosure/2010/Oct/294
http://secunia.com/advisories/42787
http://security.gentoo.org/glsa/glsa-201011-01.xml
http://sourceware.org/ml/libc-hacker/2010-10/msg00007.html
http://support.avaya.com/css/P8/documents/100120941
http://www.debian.org/security/2010/dsa-2122
http://www.kb.cert.org/vuls/id/537223
http://www.mandriva.com/security/advisories?name=MDVSA-2010:207
http://www.redhat.com/support/errata/RHSA-2010-0872.html
http://www.securityfocus.com/archive/1/515545/100/0/threaded
http://www.securityfocus.com/bid/44154
http://www.ubuntu.com/usn/USN-1009-1
http://www.vmware.com/security/advisories/VMSA-2011-0001.html
http://www.vupen.com/english/advisories/2011/0025
http://bugzilla.redhat.com/show_bug.cgi?id=643306
http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00007.html
http://rhn.redhat.com/errata/RHSA-2010-0787.html
http://www.exploit-db.com/exploits/44024/
http://www.exploit-db.com/exploits/44025/

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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, a fully functional exploit for this vulnerability is available.