CVE-2017-7692

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. Its 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 doesnt 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, its 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.

Risk Information

Base Score

8.8

MODERATE

Vector

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score

Exploitation Probability

11.163

Associated Vulnerability

Vulnerability	OS Platform
squirrelmail security update(DSA-3852-1) squirrelmail_1.4.23~svn20120406-2+deb8u1_all.deb	Linux
Squirrelmail 1.4.23~svn20120406-2+deb8u1 for Debian GNU/Linux 8 (jessie) (x64) squirrelmail_1.4.23~svn20120406-2+deb8u1_all.deb	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234