Date: Tue, 10 Oct 2023 15:41:32 -0300 From: Mark Thomas <markt@...che.org> To: oss-security@...ts.openwall.com Subject: CVE-2023-45648: Apache Tomcat: Trailer header parsing too lenient Severity: important Affected versions: - Apache Tomcat 11.0.0-M1 through 11.0.0-M11 - Apache Tomcat 10.1.0-M1 through 10.1.13 - Apache Tomcat 9.0.0-M1 through 9.0.81 - Apache Tomcat 8.5.0 through 8.5.93 Description: Improper Input Validation vulnerability in Apache Tomcat.Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue. Credit: Keran Mu and Jianjun Chen from Tsinghua University and Zhongguancun Laboratory (finder) References: https://lists.apache.org/thread/2pv8yz1pyp088tsxfb7ogltk9msk0jdp https://tomcat.apache.org/ https://www.cve.org/CVERecord?id=CVE-2023-45648
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