Vulnerability identifier: #VU33866

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2012-1820

CWE-ID: CWE-20

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Quagga
Server applications / Other server solutions

Vendor: quagga.net

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The bgp_capability_orf function in bgpd in Quagga 0.99.20.1 and earlier allows remote attackers to cause a denial of service (assertion failure and daemon exit) by leveraging a BGP peering relationship and sending a malformed Outbound Route Filtering (ORF) capability TLV in an OPEN message.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Quagga: 0.99.20.1

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External links
http://rhn.redhat.com/errata/RHSA-2012-1259.html
http://secunia.com/advisories/50941
http://www.debian.org/security/2012/dsa-2497
http://www.kb.cert.org/vuls/id/962587
http://www.securityfocus.com/bid/53775
http://www.ubuntu.com/usn/USN-1605-1

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.