#VU32568 Input validation error in Asterisk Open Source - CVE-2014-2286

Vulnerability identifier: #VU32568

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-2014-2286

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Asterisk Open Source
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Digium (Linux Support Services)

Description

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

main/http.c in Asterisk Open Source 1.8.x before 1.8.26.1, 11.8.x before 11.8.1, and 12.1.x before 12.1.1, and Certified Asterisk 1.8.x before 1.8.15-cert5 and 11.6 before 11.6-cert2, allows remote attackers to cause a denial of service (stack consumption) and possibly execute arbitrary code via an HTTP request with a large number of Cookie headers.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Asterisk Open Source: c.1.8.0 - c.1.8.1, 1.8.0 - 1.8.32.0, 11.8.0 - 11.8.1

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External links
https://downloads.asterisk.org/pub/security/AST-2014-001.html
https://downloads.asterisk.org/pub/security/AST-2014-001-1.8.diff
https://lists.fedoraproject.org/pipermail/package-announce/2014-March/130400.html
https://lists.fedoraproject.org/pipermail/package-announce/2014-March/130426.html
https://www.mandriva.com/security/advisories?name=MDVSA-2014:078
https://www.securityfocus.com/bid/66093
https://issues.asterisk.org/jira/browse/ASTERISK-23340

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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.