CVE-2023-40167

Jetty is a Java based web server and servlet engine. Prior to versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1, Jetty accepts the `+` character proceeding the content-length value in a HTTP/1 header field. This is more permissive than allowed by the RFC and other servers routinely reject such requests with 400 responses. There is no known exploit scenario, but it is conceivable that request smuggling could result if jetty is used in combination with a server that does not close the connection after sending such a 400 response. Versions 9.4.52, 10.0.16, 11.0.16, and 12.0.1 contain a patch for this issue. There is no workaround as there is no known exploit scenario.

• CWE-130

• https://github.com/eclipse/jetty.project/security/advisories/GHSA-hmr7-m48g-48f6Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2023/09/msg00039.htmlMailing List, Third Party Advisory
• https://www.debian.org/security/2023/dsa-5507Third Party Advisory
• https://www.rfc-editor.org/rfc/rfc9110#section-8.6Technical Description
• https://github.com/eclipse/jetty.project/security/advisories/GHSA-hmr7-m48g-48f6Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2023/09/msg00039.htmlMailing List, Third Party Advisory
• https://www.debian.org/security/2023/dsa-5507Third Party Advisory
• https://www.rfc-editor.org/rfc/rfc9110#section-8.6Technical Description

Published

Sep 15, 2023

Last Modified

Jun 17, 2026

Status

Modified

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