Input validation error in FreeBSD

1) Input validation error

EUVDB-ID: #VU43407

Risk: Medium

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2012-3549

CWE-ID: CWE-20 - Improper input validation

Exploit availability: Yes

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and kernel panic) via a crafted ASCONF chunk.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

FreeBSD: 8.2

External links

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=686962
http://www.exploit-db.com/exploits/20226
http://www.openwall.com/lists/oss-security/2012/08/28/9
http://www.openwall.com/lists/oss-security/2012/08/29/6
http://www.securityfocus.com/bid/54797

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. However, proof of concept for this vulnerability is available.