Input validation error in quagga (Alpine package)

1) Input validation error

EUVDB-ID: #VU33865

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-6051

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The bgp_attr_unknown function in bgp_attr.c in Quagga 0.99.21 does not properly initialize the total variable, which allows remote attackers to cause a denial of service (bgpd crash) via a crafted BGP update.

Mitigation

Install update from vendor's website.

Vulnerable software versions

quagga (Alpine package): 0.99.21-r0 - 0.99.21-r3

CPE2.3

• cpe:2.3:o:alpine:quagga_alpine_package:0.99.21-r3:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:quagga_alpine_package:0.99.21-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=2ec54a88f9fc8d7992c73a2a5462630025bcc7e8
http://git.alpinelinux.org/aports/commit/?id=f190c78b47866318407b91618adb341d02468e1c

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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