Vulnerability Note VU#316888
MobaXterm server may allow arbitrary command injection due to missing X11 authentication
Original Release date: 02 Nov 2015 | Last revised: 02 Nov 2015

Overview
The MobaXterm server prior to verion 8.3 is vulnerable to arbitrary command injection over port 6000 when using default X11 settings.

Description
CWE-306: Missing Authentication for Critical Function – CVE-2015-7244
MobaXterm server prior to version 8.3 includes an X11 server listening on all IP addresses which does not authenticate remote X11 connections over port 6000. A remote attacker may silently connect to the server, and view and inject X11 commands with the privileges of the user currently using MobaXterm.

Impact
An unauthenticated remote attacker may view and inject X11 commands with the privileges of the user currently using MobaXterm.

Solution
Apply an update

Mobatek has released MobaXterm 8.3 which addresses this issue by notifying users of incoming connection attempts and allows the user to accept or decline. Affected users are encouraged to update as soon as possible.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate UpdatedMobatekAffected30 Sep 201516 Oct 2015If you are a vendor and your product is affected, let
us know.

CVSS Metrics (Learn More)

Group
Score
Vector

Base
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal
5.9
E:POC/RL:OF/RC:C

Environmental
4.4
CDP:ND/TD:M/CR:ND/IR:ND/AR:ND

References

http://mobaxterm.mobatek.net/download-home-edition.html
http://www.securifera.com/advisories/cve-2015-7244

Credit

Thanks to Bryan Rhodes, Ryan Wincey, Micheal Reski, and Dan Mason for reporting this vulnerability.
This document was written by Garret Wassermann.

Other Information

CVE IDs:
CVE-2015-7244

Date Public:
31 Oct 2015

Date First Published:
02 Nov 2015

Date Last Updated:
02 Nov 2015

Document Revision:
26

FeedbackIf you have feedback, comments, or additional information about this vulnerability, please send us email.

Leave a Reply