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CVE-2016-8745

7.5 · HIGH

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 result…

Published Aug 10, 2017CWE-388EPSS 16.04%

Overview

CVE-2016-8745 is a high-severity vulnerability. It was published on August 10, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refrhn.redhat.com/errata/RHSA-2017-0457.htmlRefrhn.redhat.com/errata/RHSA-2017-0527.htmlRefwww.debian.org/security/2017/dsa-3754Refwww.debian.org/security/2017/dsa-3755Refwww.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.htmlRefwww.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlRefwww.securityfocus.com/bid/94828Refwww.securitytracker.com/id/1037432Refaccess.redhat.com/errata/RHSA-2017:0455Refaccess.redhat.com/errata/RHSA-2017:0456

How CyberStrike helps

Frequently asked questions

What is CVE-2016-8745?

CVE-2016-8745 is a high-severity vulnerability. It was published on August 10, 2017 and has a CVSS 3.0 base score of 7.5 (HIGH).

How severe is CVE-2016-8745?

This vulnerability has a CVSS 3.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-8745?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-8745?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-8745 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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