CVE-2009-3024: Io-Socket-SSL

Medium severity, CVSS 4.3. EPSS: 1% chance of exploitation in the next 30 days.

The verify_hostname_of_cert function in the certificate checking feature in IO-Socket-SSL (IO::Socket::SSL) 1.14 through 1.25 only matches the prefix of a hostname when no wildcard is used, which allows remote attackers to bypass the hostname check for a certificate.

Affected products

• Io-Socket-SSL Io-Socket-SSL: version 1.14 only; version 1.15 only; version 1.16 only; version 1.16_1 only; version 1.16_2 only; version 1.16_3 only; …

Published 2009-08-31. Last modified 2026-06-16.