- Date Discovered:
- 13 December 2016
- Microsoft Office is prone to a remote code-execution vulnerability. An attacker can leverage this issue to execute arbitrary code in the context of the affected application. Failed exploit attempts will likely result in denial-of-service conditions.
- Microsoft Excel 2007 SP3
- Microsoft Excel 2010 Service Pack 2 (32-bit editions)
- Microsoft Excel 2010 Service Pack 2 (64-bit editions)
- Microsoft Excel 2013 RT Service Pack 1
- Microsoft Excel 2013 Service Pack 1 (32-bit editions)
- Microsoft Excel 2013 Service Pack 1 (64-bit editions)
- Microsoft Excel 2016 (32-bit editions)
- Microsoft Excel 2016 (64-bit editions)
- Microsoft Excel Viewer
- Microsoft Office Compatibility Pack Service Pack 3
Block external access at the network boundary, unless external parties require service.Filter access to the affected computer at the network boundary if global access isn't required. Restricting access to only trusted computers and networks might greatly reduce the likelihood of exploits.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.Deploy NIDS to monitor network traffic for anomalous or suspicious activity. Monitor logs generated by NIDS and by the server itself for evidence of attacks against the server.
Do not accept or execute files from untrusted or unknown sources.To reduce the likelihood of successful exploits, never handle files that originate from unfamiliar or untrusted sources.
Permit privileged access for trusted individuals only.Permitting access to vulnerable applications for trusted individuals only can reduce the risk of an exploit.
Iliyan Velikov of PwC UK