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openSUSE:Leap:15.3:Update
fail2ban.16869
fail2ban-0.11.2-upstream-patch-for-CVE-2021-327...
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File fail2ban-0.11.2-upstream-patch-for-CVE-2021-32749.patch of Package fail2ban.16869
From 410a6ce5c80dd981c22752da034f2529b5eee844 Mon Sep 17 00:00:00 2001 From: sebres <serg.brester@sebres.de> Date: Mon, 21 Jun 2021 17:12:53 +0200 Subject: [PATCH] fixed possible RCE vulnerability, unset escape variable (default tilde) stops consider "~" char after new-line as composing escape sequence --- config/action.d/complain.conf | 2 +- config/action.d/dshield.conf | 2 +- config/action.d/mail-buffered.conf | 8 ++++---- config/action.d/mail-whois-lines.conf | 2 +- config/action.d/mail-whois.conf | 6 +++--- config/action.d/mail.conf | 6 +++--- 6 files changed, 13 insertions(+), 13 deletions(-) diff --git a/config/action.d/complain.conf b/config/action.d/complain.conf index 3a5f882c9f..4d73b05859 100644 --- a/config/action.d/complain.conf +++ b/config/action.d/complain.conf @@ -102,7 +102,7 @@ logpath = /dev/null # Notes.: Your system mail command. Is passed 2 args: subject and recipient # Values: CMD # -mailcmd = mail -s +mailcmd = mail -E 'set escape' -s # Option: mailargs # Notes.: Additional arguments to mail command. e.g. for standard Unix mail: diff --git a/config/action.d/dshield.conf b/config/action.d/dshield.conf index c128bef348..3d5a7a53a9 100644 --- a/config/action.d/dshield.conf +++ b/config/action.d/dshield.conf @@ -179,7 +179,7 @@ tcpflags = # Notes.: Your system mail command. Is passed 2 args: subject and recipient # Values: CMD # -mailcmd = mail -s +mailcmd = mail -E 'set escape' -s # Option: mailargs # Notes.: Additional arguments to mail command. e.g. for standard Unix mail: diff --git a/config/action.d/mail-buffered.conf b/config/action.d/mail-buffered.conf index 325f185b2f..79b841049c 100644 --- a/config/action.d/mail-buffered.conf +++ b/config/action.d/mail-buffered.conf @@ -17,7 +17,7 @@ actionstart = printf %%b "Hi,\n The jail <name> has been started successfully.\n Output will be buffered until <lines> lines are available.\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: started on <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: started on <fq-hostname>" <dest> # Option: actionstop # Notes.: command executed at the stop of jail (or at the end of Fail2Ban) @@ -28,13 +28,13 @@ actionstop = if [ -f <tmpfile> ]; then These hosts have been banned by Fail2Ban.\n `cat <tmpfile>` Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: Summary from <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: Summary from <fq-hostname>" <dest> rm <tmpfile> fi printf %%b "Hi,\n The jail <name> has been stopped.\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: stopped on <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: stopped on <fq-hostname>" <dest> # Option: actioncheck # Notes.: command executed once before each actionban command @@ -55,7 +55,7 @@ actionban = printf %%b "`date`: <ip> (<failures> failures)\n" >> <tmpfile> These hosts have been banned by Fail2Ban.\n `cat <tmpfile>` \nRegards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: Summary" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: Summary" <dest> rm <tmpfile> fi diff --git a/config/action.d/mail-whois-lines.conf b/config/action.d/mail-whois-lines.conf index 3a3e56b2c7..d2818cb9b9 100644 --- a/config/action.d/mail-whois-lines.conf +++ b/config/action.d/mail-whois-lines.conf @@ -72,7 +72,7 @@ actionunban = # Notes.: Your system mail command. Is passed 2 args: subject and recipient # Values: CMD # -mailcmd = mail -s +mailcmd = mail -E 'set escape' -s # Default name of the chain # diff --git a/config/action.d/mail-whois.conf b/config/action.d/mail-whois.conf index 7fea34c40d..ab33b616dc 100644 --- a/config/action.d/mail-whois.conf +++ b/config/action.d/mail-whois.conf @@ -20,7 +20,7 @@ norestored = 1 actionstart = printf %%b "Hi,\n The jail <name> has been started successfully.\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: started on <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: started on <fq-hostname>" <dest> # Option: actionstop # Notes.: command executed at the stop of jail (or at the end of Fail2Ban) @@ -29,7 +29,7 @@ actionstart = printf %%b "Hi,\n actionstop = printf %%b "Hi,\n The jail <name> has been stopped.\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: stopped on <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: stopped on <fq-hostname>" <dest> # Option: actioncheck # Notes.: command executed once before each actionban command @@ -49,7 +49,7 @@ actionban = printf %%b "Hi,\n Here is more information about <ip> :\n `%(_whois_command)s`\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: banned <ip> from <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: banned <ip> from <fq-hostname>" <dest> # Option: actionunban # Notes.: command executed when unbanning an IP. Take care that the diff --git a/config/action.d/mail.conf b/config/action.d/mail.conf index 5d8c0e154c..f4838ddcb6 100644 --- a/config/action.d/mail.conf +++ b/config/action.d/mail.conf @@ -16,7 +16,7 @@ norestored = 1 actionstart = printf %%b "Hi,\n The jail <name> has been started successfully.\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: started on <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: started on <fq-hostname>" <dest> # Option: actionstop # Notes.: command executed at the stop of jail (or at the end of Fail2Ban) @@ -25,7 +25,7 @@ actionstart = printf %%b "Hi,\n actionstop = printf %%b "Hi,\n The jail <name> has been stopped.\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: stopped on <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: stopped on <fq-hostname>" <dest> # Option: actioncheck # Notes.: command executed once before each actionban command @@ -43,7 +43,7 @@ actionban = printf %%b "Hi,\n The IP <ip> has just been banned by Fail2Ban after <failures> attempts against <name>.\n Regards,\n - Fail2Ban"|mail -s "[Fail2Ban] <name>: banned <ip> from <fq-hostname>" <dest> + Fail2Ban"|mail -E 'set escape' -s "[Fail2Ban] <name>: banned <ip> from <fq-hostname>" <dest> # Option: actionunban # Notes.: command executed when unbanning an IP. Take care that the
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