Commit Graph

11 Commits (fix-pythonic-build-install)

Author SHA1 Message Date
sebres a796cc9b91 `filter.d/dropbear.conf`: failregex extended to match different format of "Exit before auth" message;
closes gh-3791
2024-12-27 16:43:33 +01:00
MichaIng eb8b44370a
Make Dropbear regex more compatible and simpler
Dropbear uses `strftime` `"%b %d %H:%M:%S` to print its timestamps, hence we know the day and time format, but the month could be localized. We hence allow any 3 word characters for it, and additionally simplify the day and time pattern into a single group.

Signed-off-by: MichaIng <micha@dietpi.com>
2024-12-27 14:00:36 +07:00
MichaIng dd9f359f5c
Fix Dropbear filter when logging to STDOUT
Since Debian Bookworm, the distribution ships Dropbear with a native systemd service instead of the default upstream init.d service, and accordingly uses the `-F` and `-E` flags, to run it in foreground and have it logging to STDOUT instead of syslog.

As usual, timestamps and also the PID are now included by the log message emitted by Dropbear, in addition to the systemd journal log prefix.

The Dropbear filter hence does not match anymore. This commit adds the PID and timestamp as optional pattern between prefix and fail log text, to support Dropbear on Debian Bookworm and newer (and likely new versions of other distros) without breaking the old pattern when running Dropbear without `-E` flag.

Additionally, for performance reasons, this commit adds a `journalmatch` entry, matching Debian's and Fedora's `dropbear.service` with `dropbear` executable/identifier, the most likely match for a Dropbear systemd service.

Signed-off-by: MichaIng <micha@dietpi.com>
2024-12-27 13:59:35 +07:00
sebres 22afdbd536 Several filters optimized with pre-filtering using new option `prefregex` 2017-02-21 15:54:59 +01:00
Daniel Black c272573fe3 ENH: DoS resistant dropbear filter 2013-11-12 18:06:16 +11:00
Daniel Black c3f9c9aa60 BF: filter.d/dropbear
Add PAM failures which is in dropbear-2013.60 in srv-authpam.c

Patch
http://www.unchartedbackwaters.co.uk/files/dropbear/dropbear-0.52.patch
obviously has exit with lower case e so adjust regex for both.

svr-authpasswd.c in 2013.60 (at bottom) for second regex ends after the
IP so the regex was altered.

.*\s* can be compressed to .*
2013-10-31 00:21:30 +11:00
Yaroslav Halchenko 4e0ddc5f67 ENH: hardened added dropbear failregex to avoid trailing .* and enclose username in '' 2013-08-08 09:58:36 -04:00
Yaroslav Halchenko 9487ee5562 minor: consistent indentation in dropbear.conf 2013-08-08 09:54:15 -04:00
Jamyn Shanley a355fab91b https://github.com/fail2ban/fail2ban/issues/306
Fix regex for latest dropbear (keep backwards compatibility). Add test case logfiles.

Signed-off-by: Jamyn Shanley <jshanley@gmail.com>
2013-07-27 03:43:32 +00:00
Daniel Black 495f2dd877 DOC: purge of svn tags 2013-05-03 16:03:38 +10:00
Yaroslav Halchenko 0073ba3838 ENH: dropbear filter: see http://bugs.debian.org/546913
git-svn-id: https://fail2ban.svn.sourceforge.net/svnroot/fail2ban/branches/FAIL2BAN-0_8@768 a942ae1a-1317-0410-a47c-b1dcaea8d605
2011-03-23 20:36:08 +00:00