CVE-2011-3327

CVE-2011-3327 is a high-severity vulnerability in Quagga with a CVSS 2.0 base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

• Severity: High (CVSS 2.0 base score 7.5)
• EPSS exploit prediction: 8% (94th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-119
• Affected product: Quagga
• Published: 2011-10-10
• Last modified: 2026-06-16

Description

Heap-based buffer overflow in the ecommunity_ecom2str function in bgp_ecommunity.c in bgpd in Quagga before 0.99.19 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by sending a crafted BGP UPDATE message over IPv4.

Frequently asked questions

What is CVE-2011-3327?

Heap-based buffer overflow in the ecommunity_ecom2str function in bgp_ecommunity.c in bgpd in Quagga before 0.99.19 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by sending a crafted BGP UPDATE message over IPv4.

How severe is CVE-2011-3327?

CVE-2011-3327 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2011-3327 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3327?

CVE-2011-3327 primarily affects Quagga. In total, 38 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3327?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-3327 published?

CVE-2011-3327 was published on 2011-10-10 and last updated on 2026-06-16.

References

• http://code.quagga.net/?p=quagga.git%3Ba=commit%3Bh=94431dbc753171b48b5c6806af97fd690813b00a
• http://lists.opensuse.org/opensuse-security-announce/2011-09/msg00027.html
• http://lists.opensuse.org/opensuse-security-announce/2011-10/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2011-10/msg00010.html
• http://lists.opensuse.org/opensuse-security-announce/2011-12/msg00009.html
• http://rhn.redhat.com/errata/RHSA-2012-1258.html
• http://rhn.redhat.com/errata/RHSA-2012-1259.html
• http://secunia.com/advisories/46139
• http://secunia.com/advisories/46274
• http://secunia.com/advisories/48106
• http://security.gentoo.org/glsa/glsa-201202-02.xml
• http://www.debian.org/security/2011/dsa-2316
• http://www.kb.cert.org/vuls/id/668534
• http://www.quagga.net/download/quagga-0.99.19.changelog.txt
• https://bugzilla.redhat.com/show_bug.cgi?id=738400
• https://www.cert.fi/en/reports/2011/vulnerability539178.html

Affected products (38)

• cpe:2.3:a:quagga:quagga:*:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.95:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.96:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.96.1:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.96.2:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.96.3:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.96.4:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.96.5:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.97.0:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.97.1:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.97.2:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.97.3:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.97.4:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.97.5:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.98.0:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.98.1:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.98.2:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.98.3:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.98.4:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.98.5:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.98.6:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.1:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.2:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.3:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.4:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.5:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.6:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.7:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.8:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.9:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.10:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.11:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.12:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.13:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.14:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.15:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.16:*:*:*:*:*:*:*
• cpe:2.3:a:quagga:quagga:0.99.17:*:*:*:*:*:*:*

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