How severe is CVE-2013-6051?

CVE-2013-6051 has a CVSS 2.0 base score of 4.3, rated medium severity.

Is CVE-2013-6051 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-6051?

CVE-2013-6051 affects Quagga. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2013-6051?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-6051 published?

CVE-2013-6051 was published on 2013-12-14 and last updated on 2026-06-16.

CVE-2013-6051

CVE-2013-6051 is a medium-severity vulnerability in Quagga with a CVSS 2.0 base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.3)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Quagga
Published: 2013-12-14
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2013-6051?: CVE-2013-6051 has a CVSS 2.0 base score of 4.3, rated medium severity.
Is CVE-2013-6051 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-6051?: CVE-2013-6051 affects Quagga. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2013-6051?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-6051 published?: CVE-2013-6051 was published on 2013-12-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:a:quagga:quagga:0.99.21:*:*:*:*:*:*:*

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