CVE-2023-36478 Information

Description

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.

Reference

https://github.com/eclipse/jetty.project/pull/9634 https://github.com/eclipse/jetty.project/releases/tag/jetty-11.0.16 https://github.com/eclipse/jetty.project/security/advisories/GHSA-wgh7-54f2-x98r https://github.com/eclipse/jetty.project/releases/tag/jetty-9.4.53.v20231009 https://github.com/eclipse/jetty.project/releases/tag/jetty-10.0.16