Vulnerability CVE-2018-5381
Published: 2018-02-19

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.

Type:

CWE-835

 (Loop with Unreachable Exit Condition ('Infinite Loop'))

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Quagga -> Quagga 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 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
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