CVE-2011-3327

Heap-based buffer overflow in the ecommunity_ecom2str function in bgp_ecommunity.c in bgpd in...

7.5 HighFix available

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.

Exploit likelihood

7.61%Down 0.6 points since Feb 4, 2022

What each source reports

NVD Score used 7.5

Record: CVE-2011-3327
CVSS 2.0: 7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness: CWE-119
Updated: 2026-11-02

CVE List No score

Record: CVE-2011-3327
Updated: 2026-11-02

EUVDEUVD-2011-3291 No score

Record: EUVD-2011-3291
Updated: 2026-11-03

GitHub AdvisoriesGHSA-3f8p-77gw-5f5c No score

Heap-based buffer overflow in the ecommunity_ecom2str function in bgp_ecommunity.c in bgpd in...

Record: GHSA-3f8p-77gw-5f5c
Weakness: CWE-119
Updated: 2026-11-02

Affected products

quagga

Affected packages

Affected packages
Package	Affected	Fixed
`quagga` Debian:5.0	before 0.99.10-1lenny6, plus listed versions 0.99.10-1lenny10.99.10-1lenny20.99.10-1lenny30.99.10-1lenny5	0.99.10-1lenny6
`quagga` Debian:6.0	before 0.99.17-2+squeeze3, plus listed versions 0.99.17-20.99.17-2+squeeze2	0.99.17-2+squeeze3
`quagga` Red Hat:enterprise_linux:5::client	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga-contrib` Red Hat:enterprise_linux:5::client	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga-debuginfo` Red Hat:enterprise_linux:5::client	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga` Red Hat:enterprise_linux:5::client_workstation	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga-debuginfo` Red Hat:enterprise_linux:5::client_workstation	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga-devel` Red Hat:enterprise_linux:5::client_workstation	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga` Red Hat:enterprise_linux:5::server	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga-contrib` Red Hat:enterprise_linux:5::server	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1

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Affected packages
Package	Affected	Fixed
`quagga-debuginfo` Red Hat:enterprise_linux:5::server	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga-devel` Red Hat:enterprise_linux:5::server	before 0:0.98.6-7.el5_8.1	0:0.98.6-7.el5_8.1
`quagga` Red Hat:enterprise_linux:6::server	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2
`quagga-debuginfo` Red Hat:enterprise_linux:6::server	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2
`quagga-contrib` Red Hat:enterprise_linux:6::server	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2
`quagga-devel` Red Hat:enterprise_linux:6::server	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2
`quagga` Red Hat:enterprise_linux:6::workstation	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2
`quagga-debuginfo` Red Hat:enterprise_linux:6::workstation	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2
`quagga-contrib` Red Hat:enterprise_linux:6::workstation	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2
`quagga-devel` Red Hat:enterprise_linux:6::workstation	before 0:0.99.15-7.el6_3.2	0:0.99.15-7.el6_3.2

History

History
Recorded	Changed	Sources
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-2011-3327 is a high vulnerability (CVSS 7.5) in Quagga, published October 5, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.61%, the 94th percentile. Fixed in quagga 0.99.10-1lenny6.

References

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