Vulnerabilities > CVE-2019-18217 - Infinite Loop vulnerability in Proftpd
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
ProFTPD before 1.3.6b and 1.3.7rc before 1.3.7rc2 allows remote unauthenticated denial-of-service due to incorrect handling of overly long commands because main.c in a child process enters an infinite loop.
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-AE019C7E9F.NASL description This is a cumulative bug-fix update from upstream, including a fix for a pre-authentication remote denial of service issue. 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 130314 published 2019-10-28 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130314 title Fedora 29 : proftpd (2019-ae019c7e9f) NASL family Fedora Local Security Checks NASL id FEDORA_2019-848E410CFB.NASL description This is a cumulative bug-fix update from upstream, including a fix for a pre-authentication remote denial of service issue. 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 130307 published 2019-10-28 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130307 title Fedora 31 : proftpd (2019-848e410cfb) 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_DSA-4559.NASL description Stephan Zeisberg discovered that missing input validation in ProFTPD, a FTP/SFTP/FTPS server, could result in denial of service via an infinite loop. last seen 2020-06-01 modified 2020-06-02 plugin id 130525 published 2019-11-06 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130525 title Debian DSA-4559-1 : proftpd-dfsg - security update NASL family Fedora Local Security Checks NASL id FEDORA_2019-7559F29ACE.NASL description This is a cumulative bug-fix update from upstream, including a fix for a pre-authentication remote denial of service issue. 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 130352 published 2019-10-29 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130352 title Fedora 30 : proftpd (2019-7559f29ace) NASL family Debian Local Security Checks NASL id DEBIAN_DLA-1974.NASL description An issue has been found in proftp-dfsg, a versatile, virtual-hosting FTP daemon. Due to incorrect handling of overly long commands, a remote unauthenticated user could trigger a denial of service by reaching an endless loop. For Debian 8 last seen 2020-06-01 modified 2020-06-02 plugin id 130287 published 2019-10-28 reporter This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof. source https://www.tenable.com/plugins/nessus/130287 title Debian DLA-1974-1 : proftpd-dfsg security update
References
- https://github.com/proftpd/proftpd/issues/846
- https://github.com/proftpd/proftpd/blob/master/NEWS
- https://github.com/proftpd/proftpd/blob/1.3.6/NEWS
- https://github.com/proftpd/proftpd/blob/master/RELEASE_NOTES
- https://github.com/proftpd/proftpd/blob/1.3.6/RELEASE_NOTES
- https://lists.debian.org/debian-lts-announce/2019/10/msg00036.html
- https://seclists.org/bugtraq/2019/Nov/7
- https://www.debian.org/security/2019/dsa-4559
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-940889.pdf
- https://security.gentoo.org/glsa/202003-35
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NJDQRVZTILBX4BUCTIRKP2WBHDHDCJR5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YLRPYEEMQJVAXO2SXRGOQ4HBFEEPCNXG/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RB2FPAWDWXT5ALAFIC5Y3RSEMXSFL6H2/