CVE-2003-1580: Apache HTTP Server

Medium severity, CVSS 4.3. EPSS: 3.7% chance of exploitation in the next 30 days.

The Apache HTTP Server 2.0.44, when DNS resolution is enabled for client IP addresses, uses a logging format that does not identify whether a dotted quad represents an unresolved IP address, which allows remote attackers to spoof IP addresses via crafted DNS responses containing numerical top-level domains, as demonstrated by a forged 123.123.123.123 domain name, related to an "Inverse Lookup Log Corruption (ILLC)" issue.

Affected products

• Apache HTTP Server: version 2.0.44 only

Published 2010-02-05. Last modified 2026-06-16.