{"id":"CVE-2023-36478","aliases":["BIT-jenkins-2023-36478","GHSA-wgh7-54f2-x98r"],"url":"https://o3.security/vulnerability/CVE-2023-36478","summary":"HTTP/2 HPACK integer overflow and buffer allocation","details":"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\nexceed 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\nwill 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.","published":"2023-10-10T16:53:07.063Z","modified":"2026-07-15T01:49:06.966743466Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Maven","name":"org.eclipse.jetty.http2:http2-hpack","fixedVersion":"10.0.16"},{"ecosystem":"Maven","name":"org.eclipse.jetty.http2:http2-hpack","fixedVersion":"11.0.16"},{"ecosystem":"Maven","name":"org.eclipse.jetty.http3:http3-qpack","fixedVersion":"10.0.16"},{"ecosystem":"Maven","name":"org.eclipse.jetty.http3:http3-qpack","fixedVersion":"11.0.16"},{"ecosystem":"Maven","name":"org.eclipse.jetty.http2:http2-hpack","fixedVersion":"9.4.53"}],"fix":{"url":"https://github.com/eclipse/jetty.project/pull/9634","label":"eclipse/jetty.project#9634"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2023/10/18/4"},{"type":"WEB","url":"https://github.com/eclipse/jetty.project/releases/tag/jetty-10.0.16"},{"type":"WEB","url":"https://github.com/eclipse/jetty.project/releases/tag/jetty-11.0.16"},{"type":"WEB","url":"https://github.com/eclipse/jetty.project/releases/tag/jetty-9.4.53.v20231009"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00045.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/36xxx/CVE-2023-36478.json"},{"type":"ADVISORY","url":"https://github.com/eclipse/jetty.project/security/advisories/GHSA-wgh7-54f2-x98r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36478"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20231116-0011/"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20240621-0006/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2023/dsa-5540"},{"type":"FIX","url":"https://github.com/eclipse/jetty.project/pull/9634"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T01:49:06.966743466Z"}}