CVE-2009-1386: Canonical Ubuntu Linux

Medium severity, CVSS 5.0. EPSS: 80.1% chance of exploitation in the next 30 days.

ssl/s3_pkt.c in OpenSSL before 0.9.8i allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a DTLS ChangeCipherSpec packet that occurs before ClientHello.

Affected products

• Canonical Ubuntu Linux: version 6.06 only; version 8.04 only; version 8.10 only; version 9.04 only
• OpenSSL OpenSSL: after 0.9.8, before 0.9.8i (fixed in 0.9.8i)
• Red Hat OpenSSL: version 0.9.6-15 only; version 0.9.6b-3 only; version 0.9.7a-2 only

Published 2009-06-04. Last modified 2026-06-16.