What’s Vulnerable › Vulnerabilities

CVE-2018-5381

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 30.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-19 · updated 2026-06-17
• Weakness: CWE-228

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Debian Linux: 7.0, 8.0, 9.0
• quagga: through 1.2.2
• Siemens Ruggedcom Rox Ii Firmware: before 2.13.0 — fixed in 2.13.0

How to fix

Upgrade to a fixed version: Siemens Ruggedcom Rox Ii Firmware 2.13.0. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2018-5381 or the next vulnerability affects your stack