CVE-2017-7692
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.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 32.2%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 32.16% probability · 98th percentile
- Public exploits
- 1 in Exploit-DB · first 23 April 2017
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- squirrelmail/squirrelmail
- Source
- cve@mitre.org
EPSS moved from 27.8% on 21 September 2026 to 32.2% on 27 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://openwall.com/lists/oss-security/2017/04/19/6Mailing List, Third Party Advisory
- http://openwall.com/lists/oss-security/2017/04/27/1
- http://www.debian.org/security/2017/dsa-3852
- http://www.securityfocus.com/bid/98067
- http://www.securitytracker.com/id/1038312
- https://legalhackers.com/advisories/SquirrelMail-Exploit-Remote-Code-Exec-CVE-2017-7692-Vuln.htmlExploit, Third Party Advisory
- https://security.gentoo.org/glsa/201709-13
- https://www.exploit-db.com/exploits/41910/
- http://openwall.com/lists/oss-security/2017/04/19/6Mailing List, Third Party Advisory
- http://openwall.com/lists/oss-security/2017/04/27/1
- http://www.debian.org/security/2017/dsa-3852
- http://www.securityfocus.com/bid/98067
- http://www.securitytracker.com/id/1038312
- https://legalhackers.com/advisories/SquirrelMail-Exploit-Remote-Code-Exec-CVE-2017-7692-Vuln.htmlExploit, Third Party Advisory
- https://security.gentoo.org/glsa/201709-13
- https://www.exploit-db.com/exploits/41910/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.