CVE-2018-5381

Name: CVE-2018-5381
Creator: NVD / NIST
Published: 2018-02-19T13:29:00.583+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 30.46%

Last modified Jun 17, 2026

CVE-2018-5381 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 30.46% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

30.46%

98.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Quagga	Quagga	<= 1.2.2
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10
Debian	Debian Linux	7.0
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Siemens	Ruggedcom Rox Ii Firmware	< 2.13.0

References

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

Timeline

Published: Feb 19, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5381?

How severe is CVE-2018-5381?

Severity scoring for CVE-2018-5381 is pending analysis. The EPSS model estimates a 30.46% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5381?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-5381?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST