Apache Tomcat JK ISAPI Connector 1.2.41 Buffer Overflow

Credit: Mark Thomas
Risk: High
Local: No
Remote: Yes
CWE: CWE-119

CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

CVE-2016-6808 Apache Tomcat JK ISAPI Connector buffer overflow Severity: Moderate Vendor: The Apache Software Foundation Versions Affected: - Apache Tomcat JK ISAPI Connector 1.2.0 to 1.2.41 Description The IIS/ISAPI specific code implements special handling when a virtual host is present. The virtual host name and the URI are concatenated to create a virtual host mapping rule. The length checks prior to writing to the target buffer for this rule did not take account of the length of the virtual host name, creating the potential for a buffer overflow. It is not known if this overflow is exploitable. Mitigation Users of affected versions should apply one of the following mitigations - Upgrade to Apache Tomcat JK ISAPI Connector 1.2.42 - Where available, use IIS configuration to restrict the maximum URI length to 4095 - (the length of the longest virtual host name) Credit: This issue was discovered by The Apache Tomcat Security Team. References: [1] http://tomcat.apache.org/security-jk.html



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