CVE-2017-7692

Priority
Description
SquirrelMail 1.4.22 (and other versions before 20170427_0200-SVN) allows
post-authentication remote code execution via a sendmail.cf file that is
mishandled in a popen call. It's possible to exploit this vulnerability to
execute arbitrary shell commands on the remote server. The problem is in
the Deliver_SendMail.class.php with the initStream function that uses
escapeshellcmd() to sanitize the sendmail command before executing it. The
use of escapeshellcmd() is not correct in this case since it doesn't escape
whitespaces, allowing the injection of arbitrary command parameters. The
problem is in -f$envelopefrom within the sendmail command line. Hence, if
the target server uses sendmail and SquirrelMail is configured to use it as
a command-line program, it's possible to trick sendmail into using an
attacker-provided configuration file that triggers the execution of an
arbitrary command. For exploitation, the attacker must upload a sendmail.cf
file as an email attachment, and inject the sendmail.cf filename with the
-C option within the "Options > Personal Informations > Email Address"
setting.
Notes
ratliffDuplicate of CVE-2017-5181
Package
Upstream:needs-triage
Ubuntu 12.04 ESM (Precise Pangolin):DNE (precise was needed)
Ubuntu 14.04 ESM (Trusty Tahr):DNE (trusty was released [2:1.4.23~svn20120406-2+deb8u1build0.14.04.1])
Ubuntu 16.04 LTS (Xenial Xerus):released (2:1.4.23~svn20120406-2+deb8u1ubuntu0.16.04.1)
More Information

Updated: 2020-03-18 22:50:24 UTC (commit 2ea7df7bd1e69e1e489978d2724a936eb3faa1b8)