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CVE-2018-5381

6.5 · MEDIUM

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.

Published Feb 19, 2018CWE-228EPSS 30.16%

Overview

CVE-2018-5381 is a medium-severity vulnerability. It was published on February 19, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refsavannah.nongnu.org/forum/forum.php?forum_id=9095Refwww.kb.cert.org/vuls/id/940439Refcert-portal.siemens.com/productcert/pdf/ssa-451142.pdfRefgogs.quagga.net/Quagga/quagga/src/master/doc/security/Quagga-2018-1975.txtReflists.debian.org/debian-lts-announce/2018/02/msg00021.htmlRefsecurity.gentoo.org/glsa/201804-17Refusn.ubuntu.com/3573-1/Refwww.debian.org/security/2018/dsa-4115Refsavannah.nongnu.org/forum/forum.php?forum_id=9095Refwww.kb.cert.org/vuls/id/940439

How CyberStrike helps

Frequently asked questions

What is CVE-2018-5381?

CVE-2018-5381 is a medium-severity vulnerability. It was published on February 19, 2018 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2018-5381?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2018-5381?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-5381?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-5381 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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