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CVE-2017-11786

8.8 · HIGH

Skype for Business in Microsoft Lync 2013 SP1 and Skype for Business 2016 allows an attacker to steal an authentication hash that can be reused elsewhere, due to how Skype for Business handles auth…

Published Oct 13, 2017CWE-294EPSS 9.39%

Overview

CVE-2017-11786 is a high-severity vulnerability. It was published on October 13, 2017 and has a CVSS 3.0 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Skype for Business in Microsoft Lync 2013 SP1 and Skype for Business 2016 allows an attacker to steal an authentication hash that can be reused elsewhere, due to how Skype for Business handles authentication requests, aka "Skype for Business Elevation of Privilege Vulnerability."

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.securityfocus.com/bid/101156Refwww.securitytracker.com/id/1039530Refportal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786Refwww.securityfocus.com/bid/101156Refwww.securitytracker.com/id/1039530Refportal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786

How CyberStrike helps

Frequently asked questions

What is CVE-2017-11786?

CVE-2017-11786 is a high-severity vulnerability. It was published on October 13, 2017 and has a CVSS 3.0 base score of 8.8 (HIGH).

How severe is CVE-2017-11786?

This vulnerability has a CVSS 3.0 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-11786?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-11786?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-11786 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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