Headline
CVE-2016-8745: Multiple vulnerabilities (GLSA 201705-09) — Gentoo security
A bug in the error handling of the send file code for the NIO HTTP connector in Apache Tomcat 9.0.0.M1 to 9.0.0.M13, 8.5.0 to 8.5.8, 8.0.0.RC1 to 8.0.39, 7.0.0 to 7.0.73 and 6.0.16 to 6.0.48 resulted in the current Processor object being added to the Processor cache multiple times. This in turn meant that the same Processor could be used for concurrent requests. Sharing a Processor can result in information leakage between requests including, not not limited to, session ID and the response body. The bug was first noticed in 8.5.x onwards where it appears the refactoring of the Connector code for 8.5.x onwards made it more likely that the bug was observed. Initially it was thought that the 8.5.x refactoring introduced the bug but further investigation has shown that the bug is present in all currently supported Tomcat versions.
Multiple vulnerabilities have been found in Apache Tomcat, the worst of which could lead to privilege escalation.
Apache Tomcat is a Servlet-3.0/JSP-2.2 Container.
Multiple vulnerabilities have been discovered in Tomcat. Please review the CVE identifiers referenced below for details.
A remote attacker may be able to cause a Denial of Service condition, obtain sensitive information, bypass protection mechanisms and authentication restrictions.
A local attacker, who is a tomcat’s system user or belongs to tomcat’s group, could potentially escalate privileges.
There is no known workaround at this time.
All Apache Tomcat users have to manually check their Tomcat runscripts to make sure that they don’t use an old, vulnerable runscript. In addition:
All Apache Tomcat 7 users should upgrade to the latest version:
emerge --sync
emerge --ask --oneshot --verbose “>=www-servers/tomcat-7.0.70:7”
All Apache Tomcat 8 users should upgrade to the latest version:
emerge --sync
emerge --ask --oneshot --verbose “>=www-servers/tomcat-8.0.36:8”
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The code in Apache Tomcat 9.0.0.M1 to 9.0.0.M11, 8.5.0 to 8.5.6, 8.0.0.RC1 to 8.0.38, 7.0.0 to 7.0.72, and 6.0.0 to 6.0.47 that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack and/or obtain sensitive information from requests other then their own.
native/unix/native/jsvc-unix.c in jsvc in the Daemon component 1.0.3 through 1.0.6 in Apache Commons, as used in Apache Tomcat 5.5.32 through 5.5.33, 6.0.30 through 6.0.32, and 7.0.x before 7.0.20 on Linux, does not drop capabilities, which allows remote attackers to bypass read permissions for files via a request to an application.