Microsoft Skype for Business Denial of Service Vulnerability

CVE-2018-8546
Security Vulnerability

Released: Nov 13, 2018

Assigning CNA
Microsoft
CVE.org link
CVE-2018-8546
Impact
Denial of Service
Max Severity
Low

Executive Summary

A denial of service vulnerability exists in Skype for Business. An attacker who successfully exploited the vulnerability could cause Skype for Business to stop responding. Note that the denial of service would not allow an attacker to execute code or to elevate the attacker's user rights.

For an attack to be successful, this vulnerability requires that a user sends a number of emojis in the affected version of Skype for Business.

The security update addresses the vulnerability by correcting how Skype for Business handles emojis.

Exploitability

The following table provides an exploitability assessment for this vulnerability at the time of original publication.

Publicly disclosed
No
Exploited
No
Exploitability assessment
Exploitation Unlikely

Acknowledgements

  • Sabine Degen of SEC Consult Vulnerability Lab
Microsoft recognizes the efforts of those in the security community who help us protect customers through coordinated vulnerability disclosure. See Acknowledgements for more information.

Security Updates

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle.

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Disclaimer

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Revisions

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