---
title: "CVE-2017-7692\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-7692?format=md
keywords: index, follow
---

# CVE-2017-7692

Publication date 20 April 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**8.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2017-7692?format=md#impact-score)

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## 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.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-7692?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| squirrelmail | 17.04 zesty | Not in release |
| 16.10 yakkety | Fixed 2:1.4.23~svn20120406-2+deb8u1ubuntu0.16.10.1 |
| 16.04 LTS xenial | Fixed 2:1.4.23~svn20120406-2+deb8u1ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 2:1.4.23~svn20120406-2+deb8u1build0.14.04.1 |
| 12.04 LTS precise | Ignored end of life |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Notes

---

### [ratliff](https://launchpad.net/~ratliff)

Duplicate of CVE-2017-5181

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.8 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | High |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.8 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7692)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-7692)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-7692)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-7692)

### Other references

* <http://www.openwall.com/lists/oss-security/2017/04/19/6>
* <https://www.cve.org/CVERecord?id=CVE-2017-7692>