CVE-2018-5381 Information

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 Vector

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

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5