Ubuntu update for Bind

1) Assertion failure

EUVDB-ID: #VU6168

Risk: High

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2009-0696

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to perform denial of service attack.

The vulnerability exists due to assertion failure in dns_db_findrdataset() function within db.c when named is configured as a master server. A remote unauthenticated attacker can send an ANY record in the prerequisite section of a crafted dynamic update message and trigger assertion failure and daemon exit.

Successful exploitation of this vulnerability may allow an attacker to perform denial of service (DoS) attack.

Note: this vulnerability is being actively exploited.

Mitigation

Update the affected packages

Ubuntu 9.04:

bind9 1:9.5.1.dfsg.P2-1ubuntu0.1

Ubuntu 8.10:

bind9 1:9.5.0.dfsg.P2-1ubuntu3.2

Ubuntu 8.04 LTS:

bind9 1:9.4.2.dfsg.P2-2ubuntu0.2

Ubuntu 6.06 LTS:

bind9 1:9.3.2-2ubuntu1.7

Vulnerable software versions

ISC BIND: 9.4 - 9.6.1

External links

http://www.ubuntu.com/usn/usn-808-1/

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.