#VU82529 Infinite loop in Glibc - CVE-2014-8121

Vulnerability identifier: #VU82529

Vulnerability risk: Medium

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

CVE-ID: CVE-2014-8121

CWE-ID: CWE-835

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 attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop. A remote attacker can cause a denial of service (infinite loop) by performing a look-up on a database while iterating over it, which triggers the file pointer to be reset.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Glibc: 2.21

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External links
https://bugzilla.redhat.com/show_bug.cgi?id=1165192
https://rhn.redhat.com/errata/RHSA-2015-0327.html
https://sourceware.org/ml/libc-alpha/2015-02/msg00617.html
https://lists.opensuse.org/opensuse-security-announce/2015-08/msg00019.html
https://lists.opensuse.org/opensuse-security-announce/2016-02/msg00036.html
https://www.ubuntu.com/usn/USN-2985-2
https://www.ubuntu.com/usn/USN-2985-1
https://security.gentoo.org/glsa/201602-02
https://www.securityfocus.com/bid/73038
https://www.debian.org/security/2016/dsa-3480

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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.