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AUSCERT Security Bulletin
ASB-2017.0006
A vulnerability has been identified in Cisco WebEx Chrome Plugin
24 January 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco WebEx Chrome Plugin
Operating System: OS X
Windows
Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Mitigation
Member content until: Thursday, February 23 2017
OVERVIEW
A remote code execution vulnerability has been identified in Cisco's
WebEx Chrome Plugin prior to version 1.0.3.[1] There has also been
reports of version 1.0.3 still being partially vulnerable. [2]
IMPACT
The Google 0-Day project has provided the following information:
"The Google 0-Day project announced a critical remote code execution
vulnerability in Cisco's WebEx plugin for Google Chrome. This
vulnerability allows a remote attacker to execute arbitrary code on
the victim's system by delivering it to the WebEx plugin via a
special "secret" URL." [2]
MITIGATION
AusCERT would recommend uninstalling this plugin from Chrome until
either version 1.0.3 is confirmed as a valid fix to this
vulnerability or until a newer version with a valid vulnerability
fix is released. [1] [2]
REFERENCES
[1] Cisco: Magic WebEx URL Allows Arbitrary Remote Command Execution
https://bugs.chromium.org/p/project-zero/issues/detail?id=1096
[2] Critical Vulnerability in Cisco WebEx Chrome Plugin
https://isc.sans.edu/diary/Critical+Vulnerability+in+Cisco+WebEx+Chrome+Plugin/21965
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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