CVE-2013-6051

The bgp_attr_unknown function in bgp_attr.c in Quagga 0.99.21 does not properly initialize the...

4.3 Medium

The bgp_attr_unknown function in bgp_attr.c in Quagga 0.99.21 does not properly initialize the total variable, which allows remote attackers to cause a denial of service (bgpd crash) via a crafted BGP update.

Exploit likelihood

2.25%Up 1.1 points since Feb 4, 2022

What each source reports

NVD Score used 4.3

Record: CVE-2013-6051
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Updated: 2026-11-02

CVE List No score

Record: CVE-2013-6051
Updated: 2026-11-02

EUVDEUVD-2013-5880 No score

Record: EUVD-2013-5880
Updated: 2026-11-03

GitHub AdvisoriesGHSA-v7c4-xhg8-w2fh No score

The bgp_attr_unknown function in bgp_attr.c in Quagga 0.99.21 does not properly initialize the...

Record: GHSA-v7c4-xhg8-w2fh
Updated: 2026-11-02

Affected products

quagga

Affected packages

Affected packages
Package	Affected	Fixed
`quagga` Debian:6.0 From an advisory covering 2 CVEs	before 0.99.20.1-0+squeeze5, plus listed versions 0.99.17-20.99.17-2+squeeze20.99.17-2+squeeze30.99.17-30.99.17-4 Show 12 moreShow less 0.99.18-10.99.18-20.99.19-10.99.20-10.99.20-1~bpo60+10.99.20-20.99.20-30.99.20-40.99.20.1-0+squeeze10.99.20.1-0+squeeze20.99.20.1-0+squeeze30.99.20.1-0+squeeze4	0.99.20.1-0+squeeze5
`quagga` Debian:7 From an advisory covering 2 CVEs	before 0.99.22.4-1+wheezy1, plus listed versions 0.99.21-4+wheezy10.99.21-4+wheezy20.99.22-10.99.22.1-10.99.22.1-20.99.22.4-1	0.99.22.4-1+wheezy1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2013-6051 is a medium vulnerability (CVSS 4.3) in Quagga, published November 26, 2013. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.25%, the 82nd percentile. No source names a fixed version.