#VU44410 Input validation error in MaraDNS - CVE-2011-5055
Published: January 8, 2012 / Updated: August 11, 2020
Vulnerability identifier: #VU44410
Vulnerability risk: Medium
CVSSv4.0: 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
CVE-ID: CVE-2011-5055
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
MaraDNS
MaraDNS
Software vendor:
Sam Trenholme
Sam Trenholme
Description
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
MaraDNS 1.3.07.12 and 1.4.08 computes hash values for DNS data without properly 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. NOTE: this issue exists because of an incomplete fix for CVE-2012-0024.
Remediation
Install update from vendor's website.