Zero-day vulnerability in ISC BIND

Assertion failure
CVE-2009-0696

Vulnerability details

Advisory: SB2009072802 - Remote denial of service in ISC BIND

Vulnerable component: ISC BIND

CVE-ID: CVE-2009-0696

CVSSv3 score: 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

CWE-ID: CWE-617 - Reachable Assertion

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.

Public Exploits:

- ISC BIND 9 - Remote Dynamic Update Message Denial of Service (PoC) [Exploit-DB]

External links:

https://www.kb.cert.org/vuls/id/725188
http://www.securityfocus.com/archive/1/archive/1/505403/100/0/threaded
https://kb.isc.org/article/AA-00926

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.