CVE-2009-3877: Sun JDK

Medium severity, CVSS 5.0. EPSS: 4.9% chance of exploitation in the next 30 days.

Unspecified vulnerability in Sun Java SE in JDK and JRE 5.0 before Update 22, JDK and JRE 6 before Update 17, SDK and JRE 1.3.x before 1.3.1_27, and SDK and JRE 1.4.x before 1.4.2_24 allows remote attackers to cause a denial of service (memory consumption) via crafted HTTP headers, which are not properly parsed by the ASN.1 DER input stream parser, aka Bug Id 6864911.

Affected products

• Sun JDK: version 1.5.0 only; version 1.6.0 only
• Sun JRE: version 1.4.2_1 only; version 1.4.2_2 only; version 1.4.2_02 only; version 1.4.2_03 only; version 1.4.2_3 only; version 1.4.2_4 only; …
• Sun SDK: version 1.4.2_01 only; version 1.4.2_1 only; version 1.4.2_2 only; version 1.4.2_02 only; version 1.4.2_03 only; version 1.4.2_3 only; …

Published 2009-11-05. Last modified 2026-06-16.