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ubuntucveUbuntu.comUB:CVE-2017-7692
HistoryApr 20, 2017 - 12:00 a.m.

CVE-2017-7692

2017-04-2000:00:00
ubuntu.com
ubuntu.com
10

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:C/I:C/A:C

0.073 Low

EPSS

Percentile

94.1%

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. 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.

Notes

Author Note
ratliff Duplicate of CVE-2017-5181
OSVersionArchitecturePackageVersionFilename
ubuntu14.04noarchsquirrelmail< 2:1.4.23~svn20120406-2+deb8u1build0.14.04.1UNKNOWN
ubuntu16.04noarchsquirrelmail< 2:1.4.23~svn20120406-2+deb8u1ubuntu0.16.04.1UNKNOWN
ubuntu16.10noarchsquirrelmail< 2:1.4.23~svn20120406-2+deb8u1ubuntu0.16.10.1UNKNOWN

8.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

9 High

CVSS2

Access Vector

Access Complexity

Authentication

SINGLE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:S/C:C/I:C/A:C

0.073 Low

EPSS

Percentile

94.1%