SB2012010803 - Input validation error in MaraDNS

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2012-0024)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

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

MaraDNS before 1.3.07.12 and 1.4.x before 1.4.08 computes hash values for DNS data without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted queries with the Recursion Desired (RD) bit set.

Remediation

Install update from vendor's website.

References

• http://openwall.com/lists/oss-security/2012/01/03/13
• http://openwall.com/lists/oss-security/2012/01/03/6
• http://samiam.org/blog/20111229.html
• https://bugzilla.redhat.com/show_bug.cgi?id=771428