CVE - CVE-2017-7692

CVE-ID
CVE-2017-7692	Learn more at National Vulnerability Database (NVD) • Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
EXPLOIT-DB:41910 URL:https://www.exploit-db.com/exploits/41910/ MISC:http://openwall.com/lists/oss-security/2017/04/19/6 MISC:http://openwall.com/lists/oss-security/2017/04/27/1 MISC:https://legalhackers.com/advisories/SquirrelMail-Exploit-Remote-Code-Exec-CVE-2017-7692-Vuln.html GENTOO:GLSA-201709-13 URL:https://security.gentoo.org/glsa/201709-13 BID:98067 URL:http://www.securityfocus.com/bid/98067 SECTRACK:1038312 URL:http://www.securitytracker.com/id/1038312
Assigning CNA
MITRE Corporation
Date Entry Created
20170411	Disclaimer: The entry creation date may reflect when the CVE-ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20170411)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an entry on the CVE list, which standardizes names for security problems.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: cve@mitre.org

Common Vulnerabilities and Exposures

CVE-2017-7692