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Apache Tomcat: information disclosure via sendfile
Synthesis of the vulnerability
An attacker can use a vulnerability via sendfile() of Apache Tomcat, in order to obtain sensitive information or to hijack a session.
Impacted products: Tomcat, Debian, Fedora, openSUSE Leap, Oracle DB, Solaris, RHEL, SUSE Linux Enterprise Desktop, SLES, Ubuntu.
Creation date: 12/12/2016.
Revision date: 05/01/2017.
Identifiers: bulletinjan2017, cpuoct2017, CVE-2016-8745, DLA-779-1, DSA-3754-1, DSA-3755-1, FEDORA-2017-19c5440abe, FEDORA-2017-376ae2b92c, openSUSE-SU-2017:1292-1, RHSA-2017:0455-01, RHSA-2017:0456-01, RHSA-2017:0457-01, RHSA-2017:0527-01, RHSA-2017:0935-01, SUSE-SU-2017:1229-1, SUSE-SU-2017:1382-1, SUSE-SU-2017:1632-1, SUSE-SU-2017:1660-1, USN-3177-1, USN-3177-2, VIGILANCE-VUL-21355.
Description of the vulnerability
The Apache Tomcat product includes an HTTP server.
It may use the sendfile() function from the operating system to send the content of a file without reading it itself. However, an attacker can trigger an error in the response processing, in such a a way that the client receive the respond of another client, including response headers and notably the session identifier.
An attacker can therefore use a vulnerability via sendfile() of Apache Tomcat, in order to obtain sensitive information or to hijack a session.
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