CVE-2022-42252

Description

If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0 to 9.0.67, 10.0.0 to 10.0.26 or 10.1.0 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.

How to fix CVE-2022-42252

To remediate CVE-2022-42252, upgrade the affected package to a fixed version below.

• —upgrade to 8.5.83 or later
• —upgrade to 9.0.43-2~deb11u6 or later
• —upgrade to 9.0.31-1~deb10u8 or later
• —upgrade to 9.0.43-2~deb11u6 or later
• —upgrade to 8.5.83 or later
• —upgrade to 9.0.68 or later

Is CVE-2022-42252 being exploited?

Low — EPSS is 1.4%, meaning exploitation activity has not been observed at scale.

Affected packages (6)

• >= 8.5.0, < 8.5.83, >= 9.0.0, < 9.0.68, >= 10.0.0, < 10.0.27, >= 10.1.0, < 10.1.1
• from 0, < 9.0.43-2~deb11u6
• from 0, < 9.0.31-1~deb10u8
• from 0, < 9.0.43-2~deb11u6
• >= 8.5.0, < 8.5.83
• >= 9.0.0-M1, < 9.0.68

CVSS scores

References (12)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2022-42252
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2022-42252
• PATCHgithub.com/apache/tomcat
• WEBgithub.com/apache/tomcat/commit/0d089a15047faf9cb3c82f80f4d28febd4798920