CVE-2013-6051

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.

Published: 2013-12-14 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-6051 is rated Low Risk (37.6/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.43%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-6051

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 0.77% 0.43% -0.34%
2 2025-03-29 0.43% 0.77% +0.34%
3 2025-03-19 — 0.43% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-6051

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2013-6051

OS Trackers for CVE-2013-6051

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2013-6051
suse high — https://www.suse.com/security/cve/CVE-2013-6051/
ubuntu low CVE-2013-6051 low priority: Ubuntu including 1 source packages (quagga), 7 status rows across 7 suites (lucid, precise, quantal, raring, saucy, trusty, upstream): not-affected 4, DNE 1, ignored 1, released 1. https://ubuntu.com/security/CVE-2013-6051

Affected software / configurations for CVE-2013-6051

Vendor Product Version Raw CPE
quagga quagga 0.99.21 cpe:2.3:a:quagga:quagga:0.99.21:*:*:*:*:*:*:*

References for CVE-2013-6051

cvelogic Threat Intelligence