CVE-2007-3153: Daniel Stenberg C-Ares

Medium severity, CVSS 5.0. EPSS: 1.2% chance of exploitation in the next 30 days.

The ares_init:randomize_key function in c-ares, on platforms other than Windows, uses a weak facility for producing a random number sequence (Unix rand), which makes it easier for remote attackers to spoof DNS responses by guessing certain values.

Affected products

• Daniel Stenberg C-Ares: version 1.0 only; version 1.1 only; version 1.2 only; version 1.2.1 only; version 1.3 only; version 1.3.1 only; …

Published 2007-06-11. Last modified 2026-06-16.