Description
The extended-community parser in bgpd in Quagga before 0.99.18 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a malformed Extended Communities attribute.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 6.0 | quagga | 0.99.17-2+squeeze2 | DSA-2197-1 |
| Debian 5.0 | quagga | 0.99.10-1lenny5 | DSA-2197-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | quagga +2 | 0.99.15-5.el6_0.2 | RHSA-2011:0406 |
| RHEL 5 | quagga +2 | 0.98.6-7.el5_8.1 | RHSA-2012:1258 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | quagga | 1.0.20160315-5.1 | openSUSE-SU-2024:10362-1 |
Advisories 4
- RHSA-2012:1258 Red Hat Security Advisory: quagga security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2011:0406 Red Hat Security Advisory: quagga security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- DSA-2197-1 quagga - denial of service Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2024:10362-1 libospf0-1.0.20160315-5.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 46942 vdb-entry
- SUSE-SR:2011:005 vendor-advisory
- GLSA-201202-02 vendor-advisory
- RHSA-2012:1258 vendor-advisory
- SUSE-SU-2011:1316 vendor-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=654603
- 43770 third-party-advisory
- 48106 third-party-advisory
- DSA-2197 vendor-advisory
- ADV-2011-0711 vdb-entry
- http://www.quagga.net/news2.php?y=2011&m=3&d=21#id1300723200
- MDVSA-2011:058 vendor-advisory
- quagga-community-dos(66211) vdb-entry
- 71259 vdb-entry
- 43499 third-party-advisory