openSUSE Security Update: Security update for fail2ban
______________________________________________________________________________
Announcement ID: openSUSE-SU-2021:1274-1
Rating: important
References: #1145181 #1146856 #1180738 #1188610
Cross-References: CVE-2021-32749
CVSS scores:
CVE-2021-32749 (NVD) : 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products:
openSUSE Leap 15.2
openSUSE Backports SLE-15-SP3
openSUSE Backports SLE-15-SP2
openSUSE Backports SLE-15-SP1
______________________________________________________________________________
An update that solves one vulnerability and has three fixes
is now available.
Description:
This update for fail2ban fixes the following issues:
- CVE-2021-32749: prevent a command injection via mail command
(boo#1188610)
- Integrate change to resolve boo#1146856 and boo#1180738
Update to 0.11.2
- increased stability, filter and action updates
New Features and Enhancements
* fail2ban-regex:
- speedup formatted output (bypass unneeded stats creation)
- extended with prefregex statistic
- more informative output for `datepattern` (e. g. set from filter) -
pattern : description
* parsing of action in jail-configs considers space between action-names
as separator also (previously only new-line was allowed), for example
`action = a b` would specify 2 actions `a` and `b`
* new filter and jail for GitLab recognizing failed application logins
(gh#fail2ban/fail2ban#2689)
* new filter and jail for Grafana recognizing failed application logins
(gh#fail2ban/fail2ban#2855)
* new filter and jail for SoftEtherVPN recognizing failed application
logins (gh#fail2ban/fail2ban#2723)
* `filter.d/guacamole.conf` extended with `logging` parameter to follow
webapp-logging if it's configured (gh#fail2ban/fail2ban#2631)
* `filter.d/bitwarden.conf` enhanced to support syslog
(gh#fail2ban/fail2ban#2778)
* introduced new prefix `{UNB}` for `datepattern` to disable word
boundaries in regex;
* datetemplate: improved anchor detection for capturing groups `(^...)`;
* datepattern: improved handling with wrong recognized timestamps
(timezones, no datepattern, etc) as well as some warnings signaling user
about invalid pattern or zone (gh#fail2ban/fail2ban#2814):
- filter gets mode in-operation, which gets activated if filter starts
processing of new messages; in this mode a timestamp read from
log-line that appeared recently (not an old line), deviating too much
from now (up too 24h), will be considered as now (assuming a timezone
issue), so could avoid unexpected bypass of failure (previously
exceeding `findtime`);
- better interaction with non-matching optional datepattern or invalid
timestamps;
- implements special datepattern `{NONE}` - allow to find failures
totally without date-time in log messages, whereas filter will use now
as timestamp (gh#fail2ban/fail2ban#2802)
* performance optimization of `datepattern` (better search algorithm in
datedetector, especially for single template);
* fail2ban-client: extended to unban IP range(s) by subnet (CIDR/mask) or
hostname (DNS), gh#fail2ban/fail2ban#2791;
* extended capturing of alternate tags in filter, allowing combine of
multiple groups to single tuple token with new tag prefix ``
tags (gh#fail2ban/fail2ban#2755)
- Fixes
* [stability] prevent race condition - no ban if filter (backend) is
continuously busy if too many messages will be found in log, e. g.
initial scan of large log-file or journal (gh#fail2ban/fail2ban#2660)
* pyinotify-backend sporadically avoided initial scanning of log-file by
start
* python 3.9 compatibility (and Travis CI support)
* restoring a large number (500+ depending on files ulimit) of current
bans when using PyPy fixed
* manual ban is written to database, so can be restored by restart
(gh#fail2ban/fail2ban#2647)
* `jail.conf`: don't specify `action` directly in jails (use `action_` or
`banaction` instead)
* no mails-action added per default anymore (e. g. to allow that `action =
%(action_mw)s` should be specified per jail or in default section in
jail.local), closes gh#fail2ban/fail2ban#2357
* ensure we've unique action name per jail (also if parameter `actname` is
not set but name deviates from standard name, gh#fail2ban/fail2ban#2686)
* don't use `%(banaction)s` interpolation because it can be complex value
(containing `[...]` and/or quotes), so would bother the action
interpolation
* fixed type conversion in config readers (take place after all
interpolations get ready), that allows to specify typed parameters
variable (as substitutions) as well as to supply it in other sections or
as init parameters.
* `action.d/*-ipset*.conf`: several ipset actions fixed (no timeout per
default anymore), so no discrepancy between ipset and fail2ban (removal
from ipset will be managed by fail2ban only, gh#fail2ban/fail2ban#2703)
* `action.d/cloudflare.conf`: fixed `actionunban` (considering new-line
chars and optionally real json-parsing with `jq`,
gh#fail2ban/fail2ban#2140, gh#fail2ban/fail2ban#2656)
* `action.d/nftables.conf` (type=multiport only): fixed port range
selector, replacing `:` with `-` (gh#fail2ban/fail2ban#2763)
* `action.d/firewallcmd-*.conf` (multiport only): fixed port range
selector, replacing `:` with `-` (gh#fail2ban/fail2ban#2821)
* `action.d/bsd-ipfw.conf`: fixed selection of rule-no by large list or
initial `lowest_rule_num` (gh#fail2ban/fail2ban#2836)
* `filter.d/common.conf`: avoid substitute of default values in related
`lt_*` section, `__prefix_line` should be interpolated in definition
section (inside the filter-config, gh#fail2ban/fail2ban#2650)
* `filter.d/dovecot.conf`:
- add managesieve and submission support (gh#fail2ban/fail2ban#2795);
- accept messages with more verbose logging (gh#fail2ban/fail2ban#2573);
* `filter.d/courier-smtp.conf`: prefregex extended to consider port in
log-message (gh#fail2ban/fail2ban#2697)
* `filter.d/traefik-auth.conf`: filter extended with parameter mode
(`normal`, `ddos`, `aggressive`) to handle the match of username
differently (gh#fail2ban/fail2ban#2693):
- `normal`: matches 401 with supplied username only
- `ddos`: matches 401 without supplied username only
- `aggressive`: matches 401 and any variant (with and without username)
* `filter.d/sshd.conf`: normalizing of user pattern in all RE's, allowing
empty user (gh#fail2ban/fail2ban#2749)
Update to 0.11.1:
* Increment ban time (+ observer) functionality introduced.
* Database functionality extended with bad ips.
* New tags (usable in actions):
- `<bancount>` - ban count of this offender if known as bad (started by
1 for unknown)
- `<bantime>` - current ban-time of the ticket (prolongation can be
retarded up to 10 sec.)
* Introduced new action command `actionprolong` to prolong ban-time (e. g.
set new timeout if expected);
* algorithm of restore current bans after restart changed: update the
restored ban-time (and therefore end of ban) of the ticket with ban-time
of jail (as maximum), for all tickets with ban-time greater (or
persistent)
* added new setup-option `--without-tests` to skip building and installing
of tests files (gh-2287).
* added new command `fail2ban-client get <JAIL> banip
?sep-char|--with-time?` to get the banned ip addresses (gh-1916).
* purge database will be executed now (within observer). restoring
currently banned ip after service restart fixed (now < timeofban +
bantime), ignore old log failures (already banned)
* upgrade database: update new created table `bips` with entries from
table `bans` (allows restore current bans after upgrade from version <=
0.10)
- removal of SuSEfirewall2-fail2ban for factory versions since
SuSEfirewall2 will be removed from Factory (see sr#713247):
* removed references to SuSEfirewall2 service
* use references to SuSEfirewall2 only for older distributions
* Removed installation recommendation of the fail2ban-SuSEfirewall2
package for all distributions as it is deprecated.
- changed fail2ban unit file location (boo#1145181,
gh#fail2ban/fail2ban#2474)
Patch Instructions:
To install this openSUSE Security Update use the SUSE recommended installation methods
like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:
- openSUSE Leap 15.2:
zypper in -t patch openSUSE-2021-1274=1
- openSUSE Backports SLE-15-SP3:
zypper in -t patch openSUSE-2021-1274=1
- openSUSE Backports SLE-15-SP2:
zypper in -t patch openSUSE-2021-1274=1
- openSUSE Backports SLE-15-SP1:
zypper in -t patch openSUSE-2021-1274=1
Package List:
- openSUSE Leap 15.2 (noarch):
fail2ban-0.11.2-lp152.3.3.1
monitoring-plugins-fail2ban-0.11.2-lp152.3.3.1
- openSUSE Backports SLE-15-SP3 (noarch):
fail2ban-0.11.2-bp153.2.3.1
monitoring-plugins-fail2ban-0.11.2-bp153.2.3.1
- openSUSE Backports SLE-15-SP2 (noarch):
fail2ban-0.11.2-bp152.4.3.1
monitoring-plugins-fail2ban-0.11.2-bp152.4.3.1
- openSUSE Backports SLE-15-SP1 (noarch):
fail2ban-0.11.2-bp151.3.3.1
monitoring-plugins-fail2ban-0.11.2-bp151.3.3.1
References:
https://www.suse.com/security/cve/CVE-2021-32749.html
https://bugzilla.suse.com/1145181
https://bugzilla.suse.com/1146856
https://bugzilla.suse.com/1180738
https://bugzilla.suse.com/1188610
