CVE-2018-1323 Path traversal in Apache Tomcat Connectors

High 7.5 Published 12 Mar 2018 Updated 17 Sep 2024

Attackers can bypass reverse proxy restrictions to access unintended Tomcat functionality via path traversal in the ISAPI connector.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-1323?

CVE-2018-1323 is a high-severity path traversal vulnerability in Apache Tomcat Connectors, published on 12 Mar 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The IIS/ISAPI specific code in the Apache Tomcat JK ISAPI Connector 1.2.0 to 1.2.42 that normalised the requested path before matching it to the URI-worker map did not handle some edge cases correctly. If only a sub-set of the URLs supported by Tomcat were exposed via IIS, then it was possible for a specially constructed request to expose application functionality through the reverse proxy that was not intended for clients accessing Tomcat via the reverse proxy.

Weakness: CWE-22, CWE-200

Which versions are affected by CVE-2018-1323?

It affects 1 product.

Products include Apache Tomcat Jk Connector.

How do I fix CVE-2018-1323?

Upgrade to a fixed version.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2018-1323 being exploited?

There is no known exploitation of CVE-2018-1323 in the wild and no public exploit code.

Sources

Also known as GHSA-jxj8-3w7h-p8mx.