ConfigServer Services Blog

New csf v3.05

Changes:

  • Added perl regex checking to csf.pignore with the new options puser, pexe and pcmd. Text added to csf.pignore for new installations:

# Or, perl regular expression matching (regex):## pexe:/full/path/to/file as a perl regex[*]# puser:username as a perl regex[*]# pcmd:command line as a perl regex[*]## [*]You must remember to escape characters correctly when using regex’s, e.g.:# pexe:/home/.*/public_html/cgi-bin/script\.cgi# puser:bob\d.*# pcmd:/home/.*/command\s\to\smatch\s\.pl\s.*

New csf v3.04

Changes:

  • Added two new options ICMP_IN_RATE and ICMP_OUT_RATE which allow you to set the incoming and outgoing ICMP rate limits independently, or to disable rate limiting in either direction completely for ICMP packets

New csf v3.03

Changes:

  • Modified LF_DIRWATCH_FILE to use the output from “ls -lAR” instead of

Exim Dictionary Attack ACL *Exploit*

If you’re still using our old exim_deny dictionary attack solution in cPanel you should stop doing so and exclusively use the one provided by cPanel in cPanel v11. An exploit vector has been found and published for our old method:http://paste2.org/p/12037However, using that exploit method would be quite tricky because the exim_deny.pl script generates that lock file when the very first email passes through the ACL after installation and from then on it wouldn’t be possible to use the above exploit. That is, someone would have to create the symlink as described in the time between you adding the ACL into exim and the first email arriving. Alternatively, if you actively and indiscriminately delete files from /tmp, then the exploit could be applied between the time of deleting the lock file and the next email passes through exim.Such a short window of opportunity makes the exploit as described extremely unlikely as the hacker would have no idea when you’re going to install the ACL or to do it in advance of installation.We’re not aware of anyone being exploited through the use of this method.Incidentally, if you’re running csf, then lfd would pick up this type of issue through LF_DIRWATCHMany thanks to Billy for bringing this to our attention.The simplest way to remove our old exim_deny method is to select the option in WHM > Exim Configuration Editor > Reset ACL Config to Defaults and then remove the exim_deny files:

rm -fv /etc/exim_deny /etc/exim_deny.pl /etc/exim_deny_whitelist /etc/cron.hourly/exim_deny.pl

PathTools v3.26 breaks MailScanner

On servers that are running the perl modules that are a part of PathTools, MailScanner breaks with the recently released v3.26. If you’re suffering from this issue you’ll see MailScanner continually restarting. If you run MailScanner in –debug you’ll see it SegFault. In /var/log/messages you’ll see continual:

MailScanner: Process did not exit cleanly, returned 0 with signal 11

You can confirm which version of PathTools is installed using:

perl -MCwd -e ‘print “$Cwd::VERSION\n”‘

To fix this you need to downgrade PathTools to v3.2501:

wget http://search.cpan.org/CPAN/authors/id/K/KW/KWILLIAMS/PathTools-3.2501.tar.gztar -xzf PathTools-3.2501.tar.gzcd PathTools-3.2501perl Makefile.PL makemake installcd ..rm -Rfv PathTools-3.2501*

New csf v3.02

Changes:

  • Modified the text comments at the top of csf.allow for new installs:# Note: IP addressess listed in this file will NOT be ignored by lfd, so they# can still be blocked. If you do not want lfd to block an IP address you must# add it to csf.ignore
  • Removed RELAYHOSTS check from Server Check report
  • Don’t show SMTP_BLOCK check if on a VPS in Server Check report
  • PT_USERKILL, if set, will now also kill user processes that exceed PT_USERPROC
  • Fixed problem where csf.tempusers was not being cleared down on an lfd restart
  • Added two new csf command line options to flush IP’s from the temporary ban list: -tr -tf (see csf -h for more information)

New cse v1.6

Changes:

  • Modification to upload file procedure after another change by cPanel
  • Improved file viewing when clicking on the file name in the browser window

Upgrade by simply:

wget http://www.configserver.com/free/cse.tgztar -xzf cse.tgzcd csesh install.shcd ..rm -Rfv cse.tgz cse/

PayPal Donations

We are always extremely grateful for any donation that we receive for our efforts in bringing you our free scripts. After repeated requests, we’ve added Subscription Payments along with our single donations button for those that prefer this method. An example is on the csf page.Thanks again to anyone who donates, no matter the amount, as it does help us spend time on the free projects.,