CVE-2023-36478: Integer Overflow or Wraparound
(updated )
Eclipse Jetty provides a web server and servlet container. In versions 11.0.0 through 11.0.15, 10.0.0 through 10.0.15, and 9.0.0 through 9.4.52, an integer overflow in MetaDataBuilder.checkSize
allows for HTTP/2 HPACK header values to
exceed their size limit. MetaDataBuilder.java
determines if a header name or value exceeds the size limit, and throws an exception if the limit is exceeded. However, when length is very large and huffman is true, the multiplication by 4 in line 295
will overflow, and length will become negative. (_size+length)
will now be negative, and the check on line 296 will not be triggered. Furthermore, MetaDataBuilder.checkSize
allows for user-entered HPACK header value sizes to be negative, potentially leading to a very large buffer allocation later on when the user-entered size is multiplied by 2. This means that if a user provides a negative length value (or, more precisely, a length value which, when multiplied by the 4/3 fudge factor, is negative), and this length value is a very large positive number when multiplied by 2, then the user can cause a very large buffer to be allocated on the server. Users of HTTP/2 can be impacted by a remote denial of service attack. The issue has been fixed in versions 11.0.16, 10.0.16, and 9.4.53. There are no known workarounds.
References
- www.openwall.com/lists/oss-security/2023/10/18/4
- github.com/eclipse/jetty.project/pull/9634
- github.com/eclipse/jetty.project/releases/tag/jetty-10.0.16
- github.com/eclipse/jetty.project/releases/tag/jetty-11.0.16
- github.com/eclipse/jetty.project/releases/tag/jetty-9.4.53.v20231009
- github.com/eclipse/jetty.project/security/advisories/GHSA-wgh7-54f2-x98r
- nvd.nist.gov/vuln/detail/CVE-2023-36478
Detect and mitigate CVE-2023-36478 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →