Skip to content
Fencer Intel
high 7.5

CVE-2011-3327 json

Heap-based buffer overflow in the ecommunity_ecom2str function in bgp_ecommunity.c in bgpd in Quagga before 0.99.19 allows remote attackers…

published 2011-10-10 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3291

cvss
7.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.6%
EPSS 7.6% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

  • quagga RHEL 6 0.99.15-7.el6_3.2
  • quagga-contrib RHEL 6 0.99.15-7.el6_3.2
  • quagga RHEL 5 0.98.6-7.el5_8.1
  • quagga-contrib RHEL 5 0.98.6-7.el5_8.1

red hat advisories RHSA-2012:1259RHSA-2012:1258

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-3327 updated cvss 5.4

(bgpd): Heap-based buffer overflow by decoding BGP UPDATE message with unknown AS_PATH attributes

  • Red Hat Enterprise Linux 4 quagga
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) quagga 0.98.6-7.el5_8.1, quagga-contrib 0.98.6-7.el5_8.1 Red Hat Enterprise Linux Desktop (v. 5 client) quagga 0.98.6-7.el5_8.1, quagga-contrib 0.98.6-7.el5_8.1
    fixed: vendor fix RHSA-2012:1258
  • Red Hat Enterprise Linux Server (v. 6) quagga 0.99.15-7.el6_3.2 Red Hat Enterprise Linux Server Optional (v. 6) quagga 0.99.15-7.el6_3.2, quagga-contrib 0.99.15-7.el6_3.2 Red Hat Enterprise Linux Workstation (v. 6) quagga 0.99.15-7.el6_3.2 Red Hat Enterprise Linux Workstation Optional (v. 6) quagga 0.99.15-7.el6_3.2, quagga-contrib 0.99.15-7.el6_3.2
    fixed: vendor fix RHSA-2012:1259
  • Red Hat RHEL Desktop Workstation (v. 5 client) quagga 0.98.6-7.el5_8.1
    fixed: vendor fix RHSA-2012:1258

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.61% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.