CVE-2017-7692 — SquirrelMail 1

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.

01What is this vulnerability?

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…

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-04-20T14:59:00.177
• Last modified: 2026-05-13T00:24:29.033

09References

• openwall.com — http://openwall.com/lists/oss-security/2017/04/19/6
• openwall.com — http://openwall.com/lists/oss-security/2017/04/27/1
• www.debian.org — http://www.debian.org/security/2017/dsa-3852
• www.securityfocus.com — http://www.securityfocus.com/bid/98067
• www.securitytracker.com — http://www.securitytracker.com/id/1038312
• legalhackers.com — https://legalhackers.com/advisories/SquirrelMail-Exploit-Remote-Code-Exec-CVE-20…
• security.gentoo.org — https://security.gentoo.org/glsa/201709-13
• www.exploit-db.com — https://www.exploit-db.com/exploits/41910/
• openwall.com — http://openwall.com/lists/oss-security/2017/04/19/6
• openwall.com — http://openwall.com/lists/oss-security/2017/04/27/1