{"id":"CVE-2019-19270","aliases":["DEBIAN-CVE-2019-19270","EUVD-2019-8896","GHSA-5pjj-3qp3-rjg3","UBUNTU-CVE-2019-19270","openSUSE-SU-2020:0031-1"],"status":"published","title":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the...","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01136,"percentile":0.66794,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-295"],"published":"2019-11-26T03:34:09Z","modified":"2026-11-01T10:45:16Z","fixes":[{"ecosystem":"Debian:12","package":"proftpd-dfsg","fixed_in":["1.3.6b-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"proftpd-dfsg","fixed_in":["1.3.6b-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"proftpd-dfsg","fixed_in":["1.3.6b-2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.6b-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.6b-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.6b-2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.5-2","1.3.5a-1","1.3.5a-1build1","1.3.5a-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.5d-1","1.3.5e-1build1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.6-6build2","1.3.6c-1","1.3.6c-2","1.3.6c-2ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.7b+dfsg-1","1.3.7c+dfsg-1build1","1.3.7c+dfsg-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8+dfsg-8","1.3.8.a+dfsg-1","1.3.8.b+dfsg-1","1.3.8.b+dfsg-1build1","1.3.8.b+dfsg-1build2","1.3.8.b+dfsg-1build3","1.3.8.b+dfsg-1ubuntu0.1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.8.c+dfsg-2","1.3.8.c+dfsg-4","1.3.9~dfsg-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.9~dfsg-4","1.3.9b~dfsg-1","1.3.9d~dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"proftpd-dfsg","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.9~dfsg-3","1.3.9~dfsg-4"]},{"source":"osv","ecosystem":"SUSE:Package Hub 15","package":"proftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.6b-bp151.4.6.2"}]}],"bundled":5},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP1","package":"proftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.6b-bp151.4.6.2"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Leap 15.1","package":"proftpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.6b-bp151.4.6.2"}]}],"bundled":5}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"proftpd","product":"proftpd"}],"references":[{"url":"https://github.com/proftpd/proftpd/issues/859","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-19270"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/"},{"url":"https://github.com/advisories/GHSA-5pjj-3qp3-rjg3"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-19270","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-19270","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-19270","tags":["report"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/YQAELVZ2VM7ZCMMAPQ4KYBJ6KWLXIVC2/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1113041","tags":["report"]},{"url":"https://bugzilla.suse.com/1144056","tags":["report"]},{"url":"https://bugzilla.suse.com/1154600","tags":["report"]},{"url":"https://bugzilla.suse.com/1155834","tags":["report"]},{"url":"https://bugzilla.suse.com/1156210","tags":["report"]},{"url":"https://bugzilla.suse.com/1157798","tags":["report"]},{"url":"https://bugzilla.suse.com/1157803","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2017-7418","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-12815","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-18217","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-19269","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-19270","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2019-19270","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","status":"published","published":"2019-11-26T03:34:09Z","modified":"2024-08-05T02:09:39.558Z","updated_at":"2026-11-02T14:20:20.74896Z"}],"euvd":[{"id":"EUVD-2019-8896","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","status":"published","published":"2019-11-26T03:34:09Z","modified":"2024-08-05T02:09:39Z","updated_at":"2026-11-03T02:40:25.841101Z"}],"ghsa":[{"id":"GHSA-5pjj-3qp3-rjg3","title":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the...","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","status":"published","published":"2022-05-24T17:02:15Z","modified":"2023-01-28T05:08:26Z","updated_at":"2026-11-02T14:44:37.39101Z"}],"nvd":[{"id":"CVE-2019-19270","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","status":"published","published":"2019-11-26T04:15:12.95Z","modified":"2026-06-17T02:26:24.293Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:05:38.993437Z"}],"osv":[{"id":"CVE-2019-19270","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","status":"published","published":"2019-11-26T04:15:12.95Z","modified":"2026-11-09T10:45:07.2980542Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-09T10:53:57.550641Z"},{"id":"DEBIAN-CVE-2019-19270","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","status":"published","published":"2019-11-26T04:15:12.95Z","modified":"2026-09-21T07:01:16.908882067Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:45:31.867036Z"},{"id":"UBUNTU-CVE-2019-19270","description":"An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the appropriate field of a CRL entry (checking twice for subject, rather than once for subject and once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.","status":"published","published":"2019-11-26T04:15:00Z","modified":"2026-10-17T12:55:25.215121247Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:54:20.325378Z"},{"id":"openSUSE-SU-2020:0031-1","title":"Security update for proftpd","description":"This update for proftpd fixes the following issues:\n\n* GeoIP has been discontinued by Maxmind (boo#1156210)\n  This update removes module build for geoip\n    see https://support.maxmind.com/geolite-legacy-discontinuation-notice/\n\n- CVE-2019-19269: Fixed a NULL pointer dereference may occur when validating the certificate of a client connecting to the server (boo#1157803)\n- CVE-2019-19270: Fixed a Failure to check for the appropriate field of a CRL entry prevents some valid CRLs from being taken into account (boo#1157798)\n- CVE-2019-18217: Fixed remote unauthenticated denial-of-service due to incorrect handling of overly long commands (boo#1154600 gh#846)\n\nUpdate to 1.3.6b\n\n* Fixed pre-authentication remote denial-of-service issue (Issue #846).\n* Backported fix for building mod_sql_mysql using MySQL 8 (Issue #824).\n\nUpdate to 1.3.6a:\n\n* Fixed symlink navigation (Bug#4332).\n* Fixed building of mod_sftp using OpenSSL 1.1.x releases (Issue#674).\n* Fixed SITE COPY honoring of \u003cLimit\u003e restrictions (Bug#4372).\n* Fixed segfault on login when using mod_sftp + mod_sftp_pam (Issue#656).\n* Fixed restarts when using mod_facl as a static module\n* Add missing Requires(pre): group(ftp) for Leap 15 and Tumbleweed (boo#1155834)\n* Add missing Requires(pre): user(ftp) for Leap 15 and Tumbleweed (boo#1155834)\n* Use pam_keyinit.so (boo#1144056)\n\n- Reduce hard dependency on systemd to only that which is\n  necessary for building and installation.\n\nupdate to 1.3.6:\n\n* Support for using Redis for caching, logging; see the doc/howto/Redis.html\n  documentation.\n* Fixed mod_sql_postgres SSL support (Issue #415).\n* Support building against LibreSSL instead of OpenSSL (Issue #361).\n* Better support on AIX for login restraictions (Bug #4285).\n* TimeoutLogin (and other timeouts) were not working properly for SFTP\n  connections (Bug#4299).\n* Handling of the SIGILL and SIGINT signals, by the daemon process, now causes\n  the child processes to be terminated as well (Issue #461).\n* RPM .spec file naming changed to conform to Fedora guidelines.\n* Fix for 'AllowChrootSymlinks off' checking each component for symlinks (CVE-2017-7418).\n\nNew Modules:\n\n* mod_redis, mod_tls_redis, mod_wrap2_redis\n    With Redis now supported as a caching mechanism, similar to Memcache,\n    there are now Redis-using modules: mod_redis (for configuring the Redis\n    connection information), mod_tls_redis (for caching SSL sessions and\n    OCSP information using Redis), and mod_wrap2_redis (for using ACLs stored\n    in Redis).\n\nChanged Modules:\n\n* mod_ban:\n      The mod_ban module's BanCache directive can now use Redis-based caching;\n      see doc/contrib/mod_ban.html#BanCache.\n\n-New Configuration Directives\n\n* SQLPasswordArgon2, SQLPasswordScrypt\n\n      The key lengths for Argon2 and Scrypt-based passwords are now configurable\n      via these new directives; previously, the key length had been hardcoded\n      to be 32 bytes, which is not interoperable with all other implementations\n      (Issue #454).\n\nChanged Configuration Directives\n\n* AllowChrootSymlinks\n    When 'AllowChrootSymlinks off' was used, only the last portion of the\n    DefaultRoot path would be checked to see if it was a symlink.  Now,\n    each component of the DefaultRoot path will be checked to see if it is\n    a symlink when 'AllowChrootSymlinks off' is used.\n* Include\n    The Include directive can now be used within a \u003cLimit\u003e section, e.g.:\n      \u003cLimit LOGIN\u003e\n          Include /path/to/allowed.txt\n          DenyAll\n        \u003c/Limit\u003e\nAPI Changes\n  * A new JSON API has been added, for use by third-party modules. \n\n","status":"published","published":"2020-01-13T15:20:23Z","modified":"2026-02-04T03:19:18.079575Z","updated_at":"2026-11-02T16:58:31.152112Z"}]}}