{"id":"UBUNTU-CVE-2021-31826","details":"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.","modified":"2026-04-22T12:53:39.349503Z","published":"2021-04-27T04:15:00Z","upstream":["CVE-2021-31826"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-31826"},{"type":"REPORT","url":"https://shibboleth.net/community/advisories/secadv_20210426.txt"},{"type":"REPORT","url":"https://issues.shibboleth.net/jira/browse/SSPCPP-927"},{"type":"REPORT","url":"https://git.shibboleth.net/view/?p=cpp-sp.git;a=commit;h=5a47c3b9378f4c49392dd4d15189b70956f9f2ec"},{"type":"REPORT","url":"https://bugs.debian.org/987608"},{"type":"REPORT","url":"https://www.debian.org/security/2021/dsa-4905"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-31826"}],"affected":[{"package":{"name":"shibboleth-sp","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/shibboleth-sp@3.0.4+dfsg1-1ubuntu0.2?arch=source&distro=focal"},"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libapache2-mod-shib","binary_version":"3.0.4+dfsg1-1ubuntu0.2"},{"binary_name":"libapache2-mod-shib2","binary_version":"3.0.4+dfsg1-1ubuntu0.2"},{"binary_name":"libshibsp-plugins","binary_version":"3.0.4+dfsg1-1ubuntu0.2"},{"binary_version":"3.0.4+dfsg1-1ubuntu0.2","binary_name":"libshibsp8"},{"binary_name":"shibboleth-sp-common","binary_version":"3.0.4+dfsg1-1ubuntu0.2"},{"binary_name":"shibboleth-sp-utils","binary_version":"3.0.4+dfsg1-1ubuntu0.2"},{"binary_name":"shibboleth-sp2-common","binary_version":"3.0.4+dfsg1-1ubuntu0.2"},{"binary_name":"shibboleth-sp2-utils","binary_version":"3.0.4+dfsg1-1ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-31826.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}