CVE-2019-19270
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the...
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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
7.5
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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
- Record
CVE-2019-19270- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:N/I:P/A:N - Weakness
- CWE-295
- Updated
- 2026-11-02
CVE List No score
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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
- Record
CVE-2019-19270- Updated
- 2026-11-02
EUVDEUVD-2019-8896 No score
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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.
- Record
EUVD-2019-8896- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-5pjj-3qp3-rjg3 No score
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the...
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.
- Record
GHSA-5pjj-3qp3-rjg3- Updated
- 2026-11-02
OSV
7.5
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.
- Record
CVE-2019-19270- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVDEBIAN-CVE-2019-19270
7.5
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.
- Record
DEBIAN-CVE-2019-19270- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-19270
7.5
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.
- Record
UBUNTU-CVE-2019-19270- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N - Updated
- 2026-11-02
OSVopenSUSE-SU-2020:0031-1 No score
Security update for proftpd
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-discontinuation-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 'AllowChrootSymlinks off' checking each component for symlinks (CVE-2017-7418).
New Modules:
- mod_redis, mod_tls_redis, mod_wrap2_redis With Redis now supported as a caching mechanism, similar to Memcache, there are now Redis-using modules: mod_redis (for configuring the Redis connection information), mod_tls_redis (for caching SSL sessions and OCSP information using Redis), and mod_wrap2_redis (for using ACLs stored in Redis).
Changed Modules:
- mod_ban: The mod_ban module's BanCache directive can now use Redis-based caching; see doc/contrib/mod_ban.html#BanCache.
-New Configuration Directives
-
SQLPasswordArgon2, SQLPasswordScrypt
The key lengths for Argon2 and Scrypt-based passwords are now configurable via these new directives; previously, the key length had been hardcoded to be 32 bytes, which is not interoperable with all other implementations (Issue #454).
Changed Configuration Directives
- AllowChrootSymlinks When 'AllowChrootSymlinks off' was used, only the last portion of the DefaultRoot path would be checked to see if it was a symlink. Now, each component of the DefaultRoot path will be checked to see if it is a symlink when 'AllowChrootSymlinks off' is used.
- Include
The Include directive can now be used within a <Limit> section, e.g.:
<Limit LOGIN>
Include /path/to/allowed.txt
DenyAll
</Limit>
API Changes
- A new JSON API has been added, for use by third-party modules.
- Record
openSUSE-SU-2020:0031-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
proftpd-dfsgDebian:12 |
before 1.3.6b-2 | 1.3.6b-2 |
proftpd-dfsgDebian:13 |
before 1.3.6b-2 | 1.3.6b-2 |
proftpd-dfsgDebian:14 |
before 1.3.6b-2 | 1.3.6b-2 |
proftpd-dfsgUbuntu:16.04:LTS |
All versions, plus listed versions 1.3.5-21.3.5a-11.3.5a-1build11.3.5a-1ubuntu0.1 |
None known |
proftpd-dfsgUbuntu:18.04:LTS |
All versions, plus listed versions 1.3.5d-11.3.5e-1build1 |
None known |
proftpd-dfsgUbuntu:20.04:LTS |
All versions, plus listed versions 1.3.6-6build21.3.6c-11.3.6c-21.3.6c-2ubuntu0.1 |
None known |
proftpd-dfsgUbuntu:22.04:LTS |
All versions, plus listed versions 1.3.7b+dfsg-11.3.7c+dfsg-1build11.3.7c+dfsg-1ubuntu0.1 |
None known |
proftpd-dfsgUbuntu:24.04:LTS |
All versions, plus listed versions 1.3.8+dfsg-81.3.8.a+dfsg-11.3.8.b+dfsg-11.3.8.b+dfsg-1build11.3.8.b+dfsg-1build21.3.8.b+dfsg-1build31.3.8.b+dfsg-1ubuntu0.1 |
None known |
proftpd-dfsgUbuntu:25.10 |
All versions, plus listed versions 1.3.8.c+dfsg-21.3.8.c+dfsg-41.3.9~dfsg-3 |
None known |
proftpd-dfsgUbuntu:26.10 |
All versions, plus listed versions 1.3.9~dfsg-41.3.9b~dfsg-11.3.9d~dfsg-1 |
None known |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
proftpd-dfsgUbuntu:26.04:LTS |
All versions, plus listed versions 1.3.9~dfsg-31.3.9~dfsg-4 |
None known |
proftpdSUSE:Package Hub 15 From an advisory covering 5 CVEs |
before 1.3.6b-bp151.4.6.2 | 1.3.6b-bp151.4.6.2 |
proftpdSUSE:Package Hub 15 SP1 From an advisory covering 5 CVEs |
before 1.3.6b-bp151.4.6.2 | 1.3.6b-bp151.4.6.2 |
proftpdopenSUSE:Leap 15.1 From an advisory covering 5 CVEs |
before 1.3.6b-bp151.4.6.2 | 1.3.6b-bp151.4.6.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-19270 is a high vulnerability (CVSS 7.5) in Proftpd, published November 26, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.14%, the 66th percentile. Fixed in proftpd-dfsg 1.3.6b-2.
References
github.com/proftpd/proftpd/issues/859
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW
lists.opensuse.org/opensuse-security-announce/2020-01/msg00009.html
nvd.nist.gov/vuln/detail/CVE-2019-19270
lists.fedoraproject.org/archives/list/[email protected]/message/OGBBCPLJSDPFG5EI5P5G7P4KEX7YSD5G
Show 18 moreShow less
lists.fedoraproject.org/archives/list/[email protected]/message/QR65XUHPCRU3NXTSFVF2J4GWRIHC7AHW
github.com/advisories/GHSA-5pjj-3qp3-rjg3
security-tracker.debian.org/tracker/CVE-2019-19270
ubuntu.com/security/CVE-2019-19270
cve.org/CVERecord?id=CVE-2019-19270
lists.opensuse.org/archives/list/[email protected]/thread/YQAELVZ2VM7ZCMMAPQ4KYBJ6KWLXIVC2
bugzilla.suse.com/1113041
bugzilla.suse.com/1144056
bugzilla.suse.com/1154600
bugzilla.suse.com/1155834
bugzilla.suse.com/1156210
bugzilla.suse.com/1157798
bugzilla.suse.com/1157803
suse.com/security/cve/CVE-2017-7418
suse.com/security/cve/CVE-2019-12815
suse.com/security/cve/CVE-2019-18217
suse.com/security/cve/CVE-2019-19269
suse.com/security/cve/CVE-2019-19270