CVE-2023-36478

NameCVE-2023-36478
DescriptionEclipse 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3641-1, DSA-5540-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
jetty9 (PTS)buster9.4.16-0+deb10u1vulnerable
buster (security)9.4.50-4+deb10u2fixed
bullseye (security), bullseye9.4.50-4+deb11u1fixed
bookworm, bookworm (security)9.4.50-4+deb12u2fixed
sid, trixie9.4.54-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
jetty9sourcebuster9.4.50-4+deb10u1DLA-3641-1
jetty9sourcebullseye9.4.50-4+deb11u1DSA-5540-1
jetty9sourcebookworm9.4.50-4+deb12u2DSA-5540-1
jetty9source(unstable)9.4.53-1

Notes

https://github.com/eclipse/jetty.project/security/advisories/GHSA-wgh7-54f2-x98r
https://github.com/eclipse/jetty.project/pull/9634

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