Date Discovered April 11, 2017
Description Microsoft Office is prone to a privilege-escalation vulnerability.
An attackers may exploit this issue to gain elevated privileges.
- Microsoft Excel Services on Microsoft SharePoint Server 2010 Service Pack 2
- Microsoft Excel Services on Microsoft SharePoint Server 2013 Service Pack 1
- Microsoft Excel Web App 2010 Service Pack 2
- Microsoft Office Online Server
- Microsoft Office Web Apps 2010 SP2
- Microsoft Office Web Apps Server 2013 SP1
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.
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.
Credits Ashar Javed (@soaj1664ashar), Hyundai AutoEver Europe GmbH.
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