A proftpd security update has been released for Fedora 31.

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Fedora Update Notification
FEDORA-2020-876b1f664e
2020-02-27 17:26:04.898880
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Name : proftpd
Product : Fedora 31
Version : 1.3.6c
Release : 1.fc31
URL :   http://www.proftpd.org/
Summary : Flexible, stable and highly-configurable FTP server
Description :
ProFTPD is an enhanced FTP server with a focus toward simplicity, security,
and ease of configuration. It features a very Apache-like configuration
syntax, and a highly customizable server infrastructure, including support for
multiple 'virtual' FTP servers, anonymous FTP, and permission-based directory
visibility.

This package defaults to the standalone behavior of ProFTPD, but all the
needed scripts to have it run by systemd instead are included.

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Update Information:

This update, to the current upstream stable release version, is a cumulative
bug-fix release including a security fix for a use-after-free vulnerability
(CVE-2020-9273): successful exploitation of this vulnerability could allow a
remote attacker to execute arbitrary code on the affected system.
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ChangeLog:

* Wed Feb 19 2020 Paul Howarth - 1.3.6c-1
- Update to 1.3.6c
- Use-after-free vulnerability in memory pools during data transfer
(  https://github.com/proftpd/proftpd/issues/903)
- Fix mod_tls compilation with LibreSSL 2.9.x
(  https://github.com/proftpd/proftpd/issues/810)
- MaxClientsPerUser was not enforced for SFTP logins when mod_digest was
enabled (  https://github.com/proftpd/proftpd/issues/750)
- mod_sftp now handles an OpenSSH-specific private key format; it detects
such keys, and logs a hint about reformatting them to a supported format
(  https://github.com/proftpd/proftpd/issues/793)
- Directory listing was slower compared to previous ProFTPD versions
(  https://github.com/proftpd/proftpd/issues/793)
- mod_sftp crashed when using pubkey-auth with DSA keys
(  https://github.com/proftpd/proftpd/issues/866)
- Fix improper handling of TLS CRL lookups (CVE-2019-19269, CVE-2019-19270,
  https://github.com/proftpd/proftpd/issues/859)
- Leaking PAM handler and data in case of unsuccessful authentication
(  https://github.com/proftpd/proftpd/issues/870)
- SSH authentication failed for many clients due to receiving of
SSH_MSG_IGNORE packet (  http://bugs.proftpd.org/show_bug.cgi?id=4385)
- SFTP publickey authentication failed unexpectedly when user had no shadow
password info. (  https://github.com/proftpd/proftpd/issues/890)
- ftpasswd failed to restore password file permissions in some cases
(  https://github.com/proftpd/proftpd/issues/898)
- Out-of-bounds read in mod_cap getstateflags() function; this has been
addressed by updating the bundled version of libcap
(  https://github.com/proftpd/proftpd/issues/902)
Note that this build of ProFTPD uses the system version of libcap and not
the bundled version
* Thu Jan 30 2020 Fedora Release Engineering - 1.3.6b-4
- Rebuilt for   https://fedoraproject.org/wiki/Fedora_32_Mass_Rebuild
* Wed Jan 22 2020 Paul Howarth - 1.3.6b-3
- Fix API tests compile failure with GCC 10
  https://github.com/proftpd/proftpd/pull/886
- mod_sftp: When handling the 'keyboard-interactive' authentication mechanism,
as used for (e.g.) PAM, make sure to properly handle DEBUG, IGNORE,
DISCONNECT, and UNIMPLEMENTED messages, per RFC 4253
(  http://bugs.proftpd.org/show_bug.cgi?id=4385)
* Fri Nov 29 2019 Paul Howarth - 1.3.6b-2
- Fix handling of CRL lookups by properly using issuer for lookups, and
guarding against null pointers (GH#859, GH#861, CVE-2019-19269,
CVE-2019-19270)
* Sun Oct 20 2019 Paul Howarth - 1.3.6b-1
- Update to 1.3.6b
- Fixed pre-authentication remote denial-of-service issue
(CVE-2019-18217,   https://github.com/proftpd/proftpd/issues/846)
* Sun Oct 13 2019 Paul Howarth - 1.3.6a-1
- Update to 1.3.6a
- Configure script wrongly detected AIX lastlog functions
(  http://bugs.proftpd.org/show_bug.cgi?id=4304)
- AllowChrootSymlinks off could cause login failures depending on filesystem
permissions (  http://bugs.proftpd.org/show_bug.cgi?id=4306)
- mod_ctrls: error: unable to bind to local socket: Address already in use
(  https://github.com/proftpd/proftpd/issues/501)
- Failed to handle multiple %{env:...} variables in single word in
configuration (  https://github.com/proftpd/proftpd/issues/507)
- mod_sftp failed to check shadow password information when publickey
authentication used (  http://bugs.proftpd.org/show_bug.cgi?id=4308)
- Use of "AllowEmptyPasswords off" broke SFTP/SCP logins
(  http://bugs.proftpd.org/show_bug.cgi?id=4309)
- Use of mod_facl as static module caused ProFTPD to die on SIGHUP/restart
(  http://bugs.proftpd.org/show_bug.cgi?id=4310)
- Use of curve25519-sha256@libssh.org SSH2 key exchange sometimes failed
(  https://github.com/proftpd/proftpd/issues/556)
- Close extra file descriptors at startup
(  http://bugs.proftpd.org/show_bug.cgi?id=4312)
- with AuthAliasOnly in effect did not work as expected
(  http://bugs.proftpd.org/show_bug.cgi?id=4314)
- CreateHome NoRootPrivs only worked partially
(  https://github.com/proftpd/proftpd/issues/568)
- SFTP OPEN response included attribute flags that are not actually provided
(  https://github.com/proftpd/proftpd/issues/578)
- Truncation of file while being downloaded with sendfile enabled caused
timeouts due to infinite loop (  http://bugs.proftpd.org/show_bug.cgi?id=4318)
- FTP uploads frequently broke due to "Interrupted system call" error
(  http://bugs.proftpd.org/show_bug.cgi?id=4319)
- Site-to-site transfers over TLS failed
(  https://github.com/proftpd/proftpd/issues/618)
- Can't see symlinks using any FTP client when using MLSD
(  http://bugs.proftpd.org/show_bug.cgi?id=4322)
- mod_tls 1.3.6 failed to compile using OpenSSL 0.9.8e
(  http://bugs.proftpd.org/show_bug.cgi?id=4325)
- Using MaxClientsPerHost 1 in section denied logins
(  http://bugs.proftpd.org/show_bug.cgi?id=4326)
- SQLNamedConnectInfo with different backend database did not work properly
(  https://github.com/proftpd/proftpd/issues/642)
- Segfault with mod_sftp+mod_sftp_pam after successful authentication using
keyboard-interactive method (  https://github.com/proftpd/proftpd/issues/656)
- autoconf always failed to detect support for FIPS
(  https://github.com/proftpd/proftpd/issues/660)
- SFTP connections failed when using "arcfour256" cipher
(  https://github.com/proftpd/proftpd/issues/663)
- mod_auth_otp failed to build with OpenSSL 1.1.x
(  http://bugs.proftpd.org/show_bug.cgi?id=4335)
- scp broken on FreeBSD 11 (  http://bugs.proftpd.org/show_bug.cgi?id=4341)
- Update mod_sftp to handle changed APIs in OpenSSL 1.1.x releases
(  https://github.com/proftpd/proftpd/issues/674)
- Infinite loop possible in mod_sftp's set_sftphostkey() function
(  http://bugs.proftpd.org/show_bug.cgi?id=4356)
- Some ASCII text files corrupted when downloading
(  http://bugs.proftpd.org/show_bug.cgi?id=4352)
- Properly use the --includedir, --libdir configure variables in the
generated proftpd.pc pkgconfig file
(  https://github.com/proftpd/proftpd/issues/797)
- Reading invalid SSH key from database resulted in unexpected/unlogged
disconnect failures (  http://bugs.proftpd.org/show_bug.cgi?id=4350)
- Symlink navigation broken after 1.3.6 update
(  http://bugs.proftpd.org/show_bug.cgi?id=4332)
- Unable to connect to ProFTPD using TLSSessionTickets and TLSv1.3
(  https://github.com/proftpd/proftpd/issues/795)
- SITE CPFR/CPTO did not honor configurations
(  http://bugs.proftpd.org/show_bug.cgi?id=4372)
- Using "TLSProtocol SSLv23" did not enable all protocol versions
(  https://github.com/proftpd/proftpd/issues/807)
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This update can be installed with the "dnf" update program. Use
su -c 'dnf upgrade --advisory FEDORA-2020-876b1f664e' at the command
line. For more information, refer to the dnf documentation available at
  http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

All packages are signed with the Fedora Project GPG key. More details on the
GPG keys used by the Fedora Project can be found at
  https://fedoraproject.org/keys