CVE-2018-5381

moderate-risk
Published 2018-02-19

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.

Do I need to act?

~
5.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (8)

Quagga
Ruggedcom Rox Ii Firmware

Affected Vendors

Debian Siemens Quagga Canonical

References (16)

Third Party Advisory http://savannah.nongnu.org/forum/forum.php?forum_id=9095
Third Party Advisory http://www.kb.cert.org/vuls/id/940439
Mitigation https://cert-portal.siemens.com/productcert/pdf/ssa-451142.pdf
Vendor Advisory https://gogs.quagga.net/Quagga/quagga/src/master/doc/security/Quagga-2018-1975.t...
Mailing List https://lists.debian.org/debian-lts-announce/2018/02/msg00021.html
Third 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
Mitigation https://cert-portal.siemens.com/productcert/pdf/ssa-451142.pdf
Vendor Advisory https://gogs.quagga.net/Quagga/quagga/src/master/doc/security/Quagga-2018-1975.t...
Mailing List https://lists.debian.org/debian-lts-announce/2018/02/msg00021.html
Third 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
46
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 8/34 · Low
Exposure 14/34 · Moderate