Buffer overflow in HAProxy

1) Buffer overflow

EUVDB-ID: #VU32666

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 - Memory corruption

Exploit availability: No

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 - 1.4.22

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.