{"id":"CVE-2021-28164","aliases":["DEBIAN-CVE-2021-28164","EUVD-2021-0877","GHSA-v7ff-8wcx-gmc5","RHSA-2021:1509","SUSE-SU-2021:2005-1","UBUNTU-CVE-2021-28164","openSUSE-SU-2021:2005-1","openSUSE-SU-2024:10878-1"],"status":"published","title":"Authorization Before Parsing and Canonicalization in jetty","description":"In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. 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Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.","status":"published","published":"2021-04-01T14:20:14Z","modified":"2024-08-03T21:40:12.093Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-200","CWE-551"],"updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-0877","description":"In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.","status":"published","published":"2021-04-01T14:20:14Z","modified":"2024-08-03T21:40:12Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T03:24:47.350261Z"}],"ghsa":[{"id":"GHSA-v7ff-8wcx-gmc5","title":"Authorization Before Parsing and Canonicalization in jetty","description":"Release 9.4.37 introduced a more precise implementation of [RFC3986](https://tools.ietf.org/html/rfc3986#section-3.3) with regards to URI decoding, together with some new compliance modes to optionally allow support of some URI that may have ambiguous interpretation within the Servlet specified API methods behaviours.   The default mode allowed % encoded . characters to be excluded for URI normalisation, which is correct by the RFC, but is not assumed by common Servlet implementations. The default compliance mode allows requests with URIs that contain `%2e` or `%2e%2e` segments to access protected resources within the `WEB-INF` directory.  For example a request to `/context/%2e/WEB-INF/web.xml` can retrieve the `web.xml` file.  This can reveal sensitive information regarding the implementation of a web application. Workarounds found by HttpCompliance mode RFC7230_NO_AMBIGUOUS_URIS can be enabled by updating `start.d/http.ini` to include: jetty.http.compliance=RFC7230_NO_AMBIGUOUS_URIS.","status":"published","published":"2021-04-06T17:31:01Z","modified":"2023-02-01T05:05:22Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-551","CWE-863"],"updated_at":"2026-11-02T14:36:34.260786Z"}],"nvd":[{"id":"CVE-2021-28164","description":"In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.","status":"published","published":"2021-04-01T15:15:14.157Z","modified":"2026-06-17T03:45:54.787Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200","CWE-551"],"updated_at":"2026-11-02T14:06:51.197859Z"}],"osv":[{"id":"CVE-2021-28164","description":"In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.","status":"published","published":"2021-04-01T15:15:14.157Z","modified":"2026-10-24T10:50:23.836956501Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"DEBIAN-CVE-2021-28164","description":"In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.","status":"published","published":"2021-04-01T15:15:14.157Z","modified":"2026-10-23T18:02:29.41795223Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"GHSA-v7ff-8wcx-gmc5","title":"Authorization Before Parsing and Canonicalization in jetty","description":"Release 9.4.37 introduced a more precise implementation of [RFC3986](https://tools.ietf.org/html/rfc3986#section-3.3) with regards to URI decoding, together with some new compliance modes to optionally allow support of some URI that may have ambiguous interpretation within the Servlet specified API methods behaviours.   The default mode allowed % encoded . characters to be excluded for URI normalisation, which is correct by the RFC, but is not assumed by common Servlet implementations. The default compliance mode allows requests with URIs that contain `%2e` or `%2e%2e` segments to access protected resources within the `WEB-INF` directory.  For example a request to `/context/%2e/WEB-INF/web.xml` can retrieve the `web.xml` file.  This can reveal sensitive information regarding the implementation of a web application. Workarounds found by HttpCompliance mode RFC7230_NO_AMBIGUOUS_URIS can be enabled by updating `start.d/http.ini` to include: jetty.http.compliance=RFC7230_NO_AMBIGUOUS_URIS.","status":"published","published":"2021-04-06T17:31:01Z","modified":"2026-07-08T06:29:18.960048927Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-551","CWE-863"],"updated_at":"2026-11-02T15:46:56.981655Z"},{"id":"RHSA-2021:1509","title":"Red Hat Security Advisory: rh-eclipse-jetty security update","status":"published","published":"2024-09-29T18:05:55Z","modified":"2026-10-13T10:02:18Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:08.071325Z"},{"id":"UBUNTU-CVE-2021-28164","description":"In Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224, the default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.","status":"published","published":"2021-04-01T15:15:00Z","modified":"2025-10-24T04:50:13Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"openSUSE-SU-2021:2005-1","title":"Security update for jetty-minimal","description":"This update for jetty-minimal fixes the following issues:\n\nUpdate to version 9.4.42.v20210604\n\n- Fix: bsc#1187117, CVE-2021-28169 - possible for requests to the ConcatServlet with a doubly encoded path to access protected resources within the WEB-INF directory\n- Fix: bsc#1184367, CVE-2021-28165 - jetty server high CPU when client send data length \u003e 17408\n- Fix: bsc#1184368, CVE-2021-28164 - Normalize ambiguous URIs\n- Fix: bsc#1184366, CVE-2021-28163 - Exclude webapps directory from deployment scan\n","status":"published","published":"2021-07-11T08:05:38Z","modified":"2026-02-04T03:49:18.354753Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2024:10878-1","title":"jetty-annotations-9.4.43-1.2 on GA media","description":"These are all security issues fixed in the jetty-annotations-9.4.43-1.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:44:09.055501Z","updated_at":"2026-11-02T16:58:34.894275Z"},{"id":"SUSE-SU-2021:2005-1","title":"Security update for jetty-minimal","description":"This update for jetty-minimal fixes the following issues:\n\nUpdate to version 9.4.42.v20210604\n\n- Fix: bsc#1187117, CVE-2021-28169 - possible for requests to the ConcatServlet with a doubly encoded path to access protected resources within the WEB-INF directory\n- Fix: bsc#1184367, CVE-2021-28165 - jetty server high CPU when client send data length \u003e 17408\n- Fix: bsc#1184368, CVE-2021-28164 - Normalize ambiguous URIs\n- Fix: bsc#1184366, CVE-2021-28163 - Exclude webapps directory from deployment scan\n","status":"published","published":"2021-06-17T16:04:19Z","modified":"2026-02-04T02:34:06.668433Z","updated_at":"2026-11-02T15:53:49.138643Z"}]}}