Every CVE Search/ Get API key

CVE-2019-19270

An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. Failure to check for the...

7.5 HighFix available

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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.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

1.14%Up 0.1 points since Apr 14, 2021
90%50%10%1%

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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.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 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0
5.0 MediumAV: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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.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once for issuer) prevents some valid CRLs from being taken into account, and can allow clients whose certificates have been revoked to proceed with a connection to the server.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 HighCVSS: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 HighCVSS: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 HighCVSS: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:

  • 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

Affected packages
PackageAffectedFixed
proftpd-dfsg
Debian:12
before 1.3.6b-2
1.3.6b-2
proftpd-dfsg
Debian:13
before 1.3.6b-2
1.3.6b-2
proftpd-dfsg
Debian:14
before 1.3.6b-2
1.3.6b-2
proftpd-dfsg
Ubuntu: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-dfsg
Ubuntu:18.04:LTS
All versions, plus listed versions
1.3.5d-11.3.5e-1build1
None known
proftpd-dfsg
Ubuntu: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-dfsg
Ubuntu: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-dfsg
Ubuntu: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-dfsg
Ubuntu: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-dfsg
Ubuntu: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
Affected packages
PackageAffectedFixed
proftpd-dfsg
Ubuntu:26.04:LTS
All versions, plus listed versions
1.3.9~dfsg-31.3.9~dfsg-4
None known
proftpd
SUSE:Package Hub 15
From an advisory covering 5 CVEs
before 1.3.6b-bp151.4.6.2
1.3.6b-bp151.4.6.2
proftpd
SUSE: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
proftpd
openSUSE: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

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE 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

Show 18 moreShow less
MoveEnter Open