Vulnerability identifier: #VU32666

Vulnerability risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-1912

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
HAProxy
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: HAProxy

Description

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

Buffer overflow in HAProxy 1.4 through 1.4.22 and 1.5-dev through 1.5-dev17, when HTTP keep-alive is enabled, using HTTP keywords in TCP inspection rules, and running with rewrite rules that appends to requests, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted pipelined HTTP requests that prevent request realignment from occurring.

Mitigation
Install update from vendor's website.

Vulnerable software versions

HAProxy: 1.1.4, 1.3.11.4, 1.4 - 1.4.22

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External links
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/103730.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/103770.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/103794.html
http://rhn.redhat.com/errata/RHSA-2013-0729.html
http://rhn.redhat.com/errata/RHSA-2013-0868.html
http://secunia.com/advisories/52725
http://www.debian.org/security/2013/dsa-2711
http://www.openwall.com/lists/oss-security/2013/04/03/1
http://www.securityfocus.com/bid/58820
http://www.ubuntu.com/usn/USN-1800-1

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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.