← Vulnerability feed

Vulnerability record · CVE-2011-3327 · published 10 October 2011

CVE-2011-3327: Quagga memory buffer overflow vulnerability

Quagga · Quagga

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.

7.5 CVSS 2.0 High EPSS 7.6% · top 5.6% CWE-119 · Memory buffer overflow
7.5CVSS 2.0 base score
7.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
32References
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
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 Vendor Advisory
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 US Government Resource
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
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 Vendor Advisory
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 US Government Resource
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

Track CVE-2011-3327 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2018-5379Quagga double free vulnerabilityThe Quagga BGP daemon (bgpd) prior to version 1.2.3 can double-free memory when processing certain forms of UPDATE message, containing cluster-list a…EPSS 38%9.8CVE-2016-1245Quagga memory buffer overflow vulnerabilityIt was discovered that the zebra daemon in Quagga before 1.0.20161017 suffered from a stack-based buffer overflow when processing IPv6 Neighbor Disco…EPSS 3.7%8.2CVE-2017-3224Quagga insufficient verification of data authenticity vulnerabilityOpen Shortest Path First (OSPF) protocol implementations may improperly determine Link State Advertisement (LSA) recency for LSAs with MaxSequenceNum…EPSS 1.1%8.1CVE-2016-2342Quagga memory buffer overflow vulnerabilityThe bgp_nlri_parse_vpnv4 function in bgp_mplsvpn.c in the VPNv4 NLRI parser in bgpd in Quagga before 1.0.20160309, when a certain VPNv4 configuration…EPSS 12%7.8CVE-2021-44038Quagga link following vulnerabilityAn issue was discovered in Quagga through 1.2.4. Unsafe chown/chmod operations in the suggested spec file allow users (with control of the non-root-o…EPSS 0.79%7.5CVE-2018-5381Quagga vulnerabilityThe Quagga BGP daemon (bgpd) prior to version 1.2.3 has a bug in its parsing of "Capabilities" in BGP OPEN messages, in the bgp_packet.c:bgp_capabili…EPSS 30%7.5CVE-2017-16227Quagga improper input validation vulnerabilityThe aspath_put function in bgpd/bgp_aspath.c in Quagga before 1.2.2 allows remote attackers to cause a denial of service (session drop) via BGP UPDAT…EPSS 19%7.5CVE-2017-5495Quagga memory buffer overflow vulnerabilityAll versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service …EPSS 19%

Source: NIST National Vulnerability Database (record CVE-2011-3327), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.