January 9, 2018
Microsoft Office is prone to a memory-corruption vulnerability. An attacker can leverage this issue to execute arbitrary code in the context of the currently logged-in user. Failed exploit attempts will likely result in denial of service conditions.
- Microsoft Office 2007 SP3
- Microsoft Office 2010 Service Pack 2 (32-bit editions)
- Microsoft Office 2010 Service Pack 2 (64-bit editions)
- Microsoft Office 2013 Service Pack 1 (32-bit editions)
- Microsoft Office 2013 Service Pack 1 (64-bit editions)
- Microsoft Office 2016 (32-bit edition)
- Microsoft Office 2016 (64-bit edition)
- Microsoft Office 2016 Click-to-Run (C2R) for 32-bit edition
- Microsoft Office 2016 Click-to-Run (C2R) for 64-bit edition
- Microsoft Office Compatibility Pack Service Pack 3
- Microsoft Word 2007 SP3
- Microsoft Word 2010 Service Pack 2 (32-bit editions)
- Microsoft Word 2010 Service Pack 2 (64-bit editions)
- Microsoft Word 2013 RT Service Pack 1
- Microsoft Word 2013 Service Pack 1 (32-bit editions)
- Microsoft Word 2013 Service Pack 1 (64-bit editions)
- Microsoft Word 2016 (32-bit edition)
- Microsoft Word 2016 (64-bit edition)
Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.
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.
Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.
Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploits of memory-corruption vulnerabilities.
Updates are available. Please see the references or vendor advisory for more information.
Liang Yin of Tencent PC Manager, Zhiyuan Zheng, Yuki Chen of Qihoo 360 Vulcan Team, Yang Kang, Ding Maoyin and Song Shenlei of Qihoo 360 Core Security, Luka Treiber of 0patch Team – ACROS Security, zhouat of Qihoo 360 Vulcan Team, bee13oy of Qihoo 360 Vulcan Team, Netanel Ben Simon and Omer Gull of Check Point Software Technologies.
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