{"id":"UBUNTU-CVE-2022-37797","details":"In lighttpd 1.4.65, mod_wstunnel does not initialize a handler function pointer if an invalid HTTP request (websocket handshake) is received. It leads to null pointer dereference which crashes the server. It could be used by an external attacker to cause denial of service condition.","modified":"2026-04-22T13:26:11.280984Z","published":"2022-09-12T15:15:00Z","upstream":["CVE-2022-37797"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2022-37797"},{"type":"REPORT","url":"https://redmine.lighttpd.net/issues/3165"},{"type":"REPORT","url":"https://git.lighttpd.net/lighttpd/lighttpd1.4/commit/971773f1fae600074b46ef64f3ca1f76c227985f"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2022-37797"}],"affected":[{"package":{"name":"lighttpd","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/lighttpd@1.4.55-1ubuntu1.20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.53-4ubuntu2","1.4.54-2ubuntu1","1.4.55-1ubuntu1","1.4.55-1ubuntu1.20.04.1","1.4.55-1ubuntu1.20.04.2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-authn-gssapi"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-authn-pam"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-authn-sasl"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-cml"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-geoip"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-magnet"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-maxminddb"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-trigger-b4-dl"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-vhostdb-dbi"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-vhostdb-pgsql"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-mod-webdav"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-modules-ldap"},{"binary_version":"1.4.55-1ubuntu1.20.04.2","binary_name":"lighttpd-modules-mysql"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-37797.json"}},{"package":{"name":"lighttpd","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/lighttpd@1.4.63-1ubuntu3.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.59-1ubuntu2","1.4.59-1ubuntu3","1.4.63-1ubuntu1","1.4.63-1ubuntu2","1.4.63-1ubuntu3","1.4.63-1ubuntu3.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-authn-gssapi"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-authn-pam"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-authn-sasl"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-deflate"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-geoip"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-maxminddb"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-mbedtls"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-nss"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-openssl"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-trigger-b4-dl"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-vhostdb-pgsql"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-webdav"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-mod-wolfssl"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-modules-dbi"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-modules-ldap"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-modules-lua"},{"binary_version":"1.4.63-1ubuntu3.1","binary_name":"lighttpd-modules-mysql"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2022/UBUNTU-CVE-2022-37797.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"}]}