Quantum Secular Labs / Blog / Advisories

CVE-2009-1096: Sun JDK: Buffer overflow

CVE-2009-1096 has a CVSS v2 base score of 10.0 (the maximum on that scale) and affects Sun JDK. Per its scoring, it can be exploited over the network, without authentication. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

Buffer overflow in unpack200 in Java SE Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update 17 and earlier, and 6 Update 12 and earlier, allows remote attackers to access files or execute arbitrary code via a JAR file with crafted Pack200 headers.

Severity breakdown

CVSS v2.0 10.0: AV:N/AC:L/Au:N/C:C/I:C/A:C

Access vector: Network. Exploitable remotely over the network.
Access complexity: Low. No special conditions are required.
Authentication: None. No authentication is needed.
Confidentiality impact: Complete. Total information disclosure.
Integrity impact: Complete. Total loss of integrity.
Availability impact: Complete. Total shutdown of the component.

Underlying weakness

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.

Affected products

Sun JDK: up to and including 1.5.0; 1.5.0; 1.5.0 update1; 1.5.0 update10; 1.5.0 update11; 1.5.0 update11_b03; 1.5.0 update12; 1.5.0 update13; 1.5.0 update14; 1.5.0 update15; 1.5.0 update16; 1.5.0 update2
Sun JRE: up to and including 1.5.0; 1.5.0; 1.5.0 update1; 1.5.0 update10; 1.5.0 update11; 1.5.0 update12; 1.5.0 update13; 1.5.0 update14; 1.5.0 update15; 1.5.0 update16; 1.5.0 update2; 1.5.0 update3