Vulnerability in Microsoft Lync
CVE-2017-11786
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 Busine…
EPSS: 0.115 (93.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Lync — versions 2013
- Microsoft Skype_for_business — versions 2016
- Microsoft Corporation Skype For Business — versions Microsoft Lync 2013 SP1 and Skype for Business 2016
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secure@microsoft.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- secure@microsoft.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- secure@microsoft.com (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_SECTRACK)
Frequently asked questions
- What is CVE-2017-11786?
- CVE-2017-11786 is a high-severity vulnerability in Microsoft Lync, classified under Authentication Bypass by Capture-replay. CVSS score: 8.8/10. Published 2017-10-13.
- How severe is CVE-2017-11786?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2017-11786 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.