Date: Thu, 27 Oct 2016 13:30:37 +0100 From: Mark Thomas <markt@...che.org> To: oss-security@...ts.openwall.com Subject: [SECURITY] CVE-2016-0762 Apache Tomcat Realm Timing Attack CVE-2016-0762 Apache Tomcat Realm Timing Attack Severity: Low Vendor: The Apache Software Foundation Versions Affected: Apache Tomcat 9.0.0.M1 to 9.0.0.M9 Apache Tomcat 8.5.0 to 8.5.4 Apache Tomcat 8.0.0.RC1 to 8.0.36 Apache Tomcat 7.0.0 to 7.0.70 Apache Tomcat 6.0.0 to 6.0.45 Earlier, unsupported versions may also be affected. Description The Realm implementations did not process the supplied password if the supplied user name did not exist. This made a timing attack possible to determine valid user names. Note that the default configuration includes the LockOutRealm which makes exploitation of this vulnerability harder. Mitigation Users of affected versions should apply one of the following mitigations - Upgrade to Apache Tomcat 9.0.0.M10 or later - Upgrade to Apache Tomcat 8.5.5 or later - Upgrade to Apache Tomcat 8.0.37 or later - Upgrade to Apache Tomcat 7.0.72 or later (Apache Tomcat 7.0.71 has the fix but was not released) - Upgrade to Apache Tomcat 6.0.47 or later (Apache Tomcat 6.0.46 has the fix but was not released) Credit: This issue was discovered by The Apache Tomcat Security Team. References:  http://tomcat.apache.org/security-9.html  http://tomcat.apache.org/security-8.html  http://tomcat.apache.org/security-7.html  http://tomcat.apache.org/security-6.html
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