Vulnerabilities > CVE-2019-19269 - NULL Pointer Dereference vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
HIGH Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
Nessus
NASL family SuSE Local Security Checks NASL id OPENSUSE-2020-31.NASL description This update for proftpd fixes the following issues : - GeoIP has been discontinued by Maxmind (boo#1156210) This update removes module build for geoip see https://support.maxmind.com/geolite-legacy-discontinuati on-notice/ - CVE-2019-19269: Fixed a NULL pointer dereference may occur when validating the certificate of a client connecting to the server (boo#1157803) - 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) - CVE-2019-18217: Fixed remote unauthenticated denial-of-service due to incorrect handling of overly long commands (boo#1154600 gh#846) Update to 1.3.6b - Fixed pre-authentication remote denial-of-service issue (Issue #846). - Backported fix for building mod_sql_mysql using MySQL 8 (Issue #824). Update to 1.3.6a : - Fixed symlink navigation (Bug#4332). - Fixed building of mod_sftp using OpenSSL 1.1.x releases (Issue#674). - Fixed SITE COPY honoring of <Limit> restrictions (Bug#4372). - Fixed segfault on login when using mod_sftp + mod_sftp_pam (Issue#656). - Fixed restarts when using mod_facl as a static module - Add missing Requires(pre): group(ftp) for Leap 15 and Tumbleweed (boo#1155834) - Add missing Requires(pre): user(ftp) for Leap 15 and Tumbleweed (boo#1155834) - Use pam_keyinit.so (boo#1144056) - Reduce hard dependency on systemd to only that which is necessary for building and installation. update to 1.3.6 : - Support for using Redis for caching, logging; see the doc/howto/Redis.html documentation. - Fixed mod_sql_postgres SSL support (Issue #415). - Support building against LibreSSL instead of OpenSSL (Issue #361). - Better support on AIX for login restraictions (Bug #4285). - TimeoutLogin (and other timeouts) were not working properly for SFTP connections (Bug#4299). - Handling of the SIGILL and SIGINT signals, by the daemon process, now causes the child processes to be terminated as well (Issue #461). - RPM .spec file naming changed to conform to Fedora guidelines. - Fix for last seen 2020-06-01 modified 2020-06-02 plugin id 132911 published 2020-01-15 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/132911 title openSUSE Security Update : proftpd (openSUSE-2020-31) NASL family Fedora Local Security Checks NASL id FEDORA_2019-BFACF1E958.NASL description This update addresses a number of bugs affecting processing of CRLs in mod_tls, including possible NULL pointer dereferences and missing some checks. Thanks to Lionel Debroux for reporting them. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 131794 published 2019-12-09 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131794 title Fedora 31 : proftpd (2019-bfacf1e958) NASL family Gentoo Local Security Checks NASL id GENTOO_GLSA-202003-35.NASL description The remote host is affected by the vulnerability described in GLSA-202003-35 (ProFTPd: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in ProFTPd. Please review the CVE identifiers referenced below for details. Impact : A remote attacker, by interrupting the data transfer channel, could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition. Workaround : There is no known workaround at this time. last seen 2020-03-21 modified 2020-03-18 plugin id 134641 published 2020-03-18 reporter This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/134641 title GLSA-202003-35 : ProFTPd: Multiple vulnerabilities NASL family Debian Local Security Checks NASL id DEBIAN_DLA-2018.NASL description In mod_tls a crash with empty CRL was fixed. For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 131436 published 2019-12-03 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131436 title Debian DLA-2018-1 : proftpd-dfsg security update NASL family Fedora Local Security Checks NASL id FEDORA_2019-65A983B8B6.NASL description This update addresses a number of bugs affecting processing of CRLs in mod_tls, including possible NULL pointer dereferences and missing some checks. Thanks to Lionel Debroux for reporting them. Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues. last seen 2020-06-01 modified 2020-06-02 plugin id 131791 published 2019-12-09 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/131791 title Fedora 30 : proftpd (2019-65a983b8b6)
References
- https://lists.debian.org/debian-lts-announce/2019/11/msg00039.html
- https://github.com/proftpd/proftpd/issues/861
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
- https://security.gentoo.org/glsa/202003-35
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW/