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Vulnerability record · CVE-2018-5381 · published 19 February 2018

CVE-2018-5381: Quagga vulnerability

Quagga · Quagga

The 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_capability_msg_parse function. The parser can enter an infinite loop on invalid capabilities if a Multi-Protocol capability does not have a recognized AFI/SAFI, causing a denial of service.

7.5 CVSS 3.0 High EPSS 30% · top 1.8% CWE-228 · CWE-228CWE-835 · CWE-835
7.5CVSS 3.0 base score, v2 5.0
30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

The 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_capability_msg_parse function. The parser can enter an infinite loop on invalid capabilities if a Multi-Protocol capability does not have a recognized AFI/SAFI, causing a denial of service.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

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

References

LinkTags
http://savannah.nongnu.org/forum/forum.php?forum_id=9095 Third Party Advisory
http://www.kb.cert.org/vuls/id/940439 Third Party AdvisoryUS Government Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-451142.pdf MitigationThird Party Advisory
https://gogs.quagga.net/Quagga/quagga/src/master/doc/security/Quagga-2018-1975.txt Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00021.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201804-17 Third Party Advisory
https://usn.ubuntu.com/3573-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4115 Third Party Advisory
http://savannah.nongnu.org/forum/forum.php?forum_id=9095 Third Party Advisory
http://www.kb.cert.org/vuls/id/940439 Third Party AdvisoryUS Government Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-451142.pdf MitigationThird Party Advisory
https://gogs.quagga.net/Quagga/quagga/src/master/doc/security/Quagga-2018-1975.txt Vendor Advisory
https://lists.debian.org/debian-lts-announce/2018/02/msg00021.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201804-17 Third Party Advisory
https://usn.ubuntu.com/3573-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4115 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-5381), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.