{"id":"CVE-2021-31826","aliases":["DEBIAN-CVE-2021-31826","DSA-4905-1","EUVD-2021-18701","GHSA-rqpx-m7mv-mxxf","UBUNTU-CVE-2021-31826"],"status":"published","title":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw...","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","severity":{"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","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.02,"percentile":0.81041,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2021-04-27T00:00:00Z","modified":"2026-10-23T18:03:26Z","fixes":[{"ecosystem":"Debian:12","package":"shibboleth-sp","fixed_in":["3.2.2+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"shibboleth-sp","fixed_in":["3.2.2+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"shibboleth-sp","fixed_in":["3.2.2+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Debian:10","package":"shibboleth-sp","fixed_in":["3.0.4+dfsg1-1+deb10u2"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"shibboleth-sp","fixed_in":["3.0.4+dfsg1-1ubuntu0.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"shibboleth-sp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.2+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"shibboleth-sp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.2+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"shibboleth-sp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.2+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Debian:10","package":"shibboleth-sp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.4+dfsg1-1+deb10u2"}]}],"versions":["3.0.4+dfsg1-1","3.0.4+dfsg1-1+deb10u1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"shibboleth-sp","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.4+dfsg1-1ubuntu0.2"}]}],"versions":["3.0.4+dfsg1-1","3.0.4+dfsg1-1build1","3.0.4+dfsg1-1ubuntu0.1"]}],"products":[{"vendor":"shibboleth","product":"service_provider"}],"references":[{"url":"https://shibboleth.net/community/advisories/secadv_20210426.txt","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","report"]},{"url":"https://issues.shibboleth.net/jira/browse/SSPCPP-927","tags":["x_refsource_MISC","x_transferred","Exploit","Patch","Vendor Advisory","fix","report"]},{"url":"https://git.shibboleth.net/view/?p=cpp-sp.git%3Ba=commit%3Bh=5a47c3b9378f4c49392dd4d15189b70956f9f2ec","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://bugs.debian.org/987608","tags":["x_refsource_MISC","x_transferred","Mailing List","Third Party Advisory","advisory","report"]},{"url":"https://www.debian.org/security/2021/dsa-4905","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-31826"},{"url":"https://git.shibboleth.net/view/?p=cpp-sp.git;a=commit;h=5a47c3b9378f4c49392dd4d15189b70956f9f2ec","tags":["report"]},{"url":"https://github.com/advisories/GHSA-rqpx-m7mv-mxxf"},{"url":"https://security-tracker.debian.org/tracker/CVE-2021-31826","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-31826","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-31826","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-31826","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","status":"published","published":"2021-04-27T03:33:47Z","modified":"2024-08-03T23:10:30.613Z","updated_at":"2026-11-02T14:33:05.665371Z"}],"euvd":[{"id":"EUVD-2021-18701","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","status":"published","published":"2021-04-27T03:33:47Z","modified":"2024-08-03T23:10:30Z","updated_at":"2026-11-03T03:24:37.97373Z"}],"ghsa":[{"id":"GHSA-rqpx-m7mv-mxxf","title":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw...","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","status":"published","published":"2022-05-24T17:48:57Z","modified":"2023-01-29T05:06:30Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:46:02.46151Z"}],"nvd":[{"id":"CVE-2021-31826","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","status":"published","published":"2021-04-27T04:15:08.55Z","modified":"2026-06-17T03:52:18.15Z","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","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:06:52.81233Z"}],"osv":[{"id":"CVE-2021-31826","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","status":"published","published":"2021-04-27T04:15:08.55Z","modified":"2026-03-15T22:40:37.045603Z","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":"2026-11-02T15:44:19.483607Z"},{"id":"DEBIAN-CVE-2021-31826","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","status":"published","published":"2021-04-27T04:15:08.55Z","modified":"2026-10-23T18:03:26.485082901Z","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":"2026-11-02T15:45:34.94143Z"},{"id":"UBUNTU-CVE-2021-31826","description":"Shibboleth Service Provider 3.x before 3.2.2 is prone to a NULL pointer dereference flaw involving the session recovery feature. The flaw is exploitable (for a daemon crash) on systems not using this feature if a crafted cookie is supplied.","status":"published","published":"2021-04-27T04:15:00Z","modified":"2026-04-22T12:53:39.349503Z","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":"2026-11-02T15:54:27.332852Z"},{"id":"DSA-4905-1","title":"shibboleth-sp - security update","status":"published","published":"2021-04-27T00:00:00Z","modified":"2026-03-09T02:11:08.939741Z","updated_at":"2026-11-02T15:46:17.19998Z"}]}}