High severity · published Oct 13, 2017
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…
8.8
CVSS
9.4%
EPSS
No
On KEV
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."
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)9.4% · higher than 95% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LY
Lync · Microsoft
2013 · source: NVD
SF
Skype For Business · Microsoft
2016 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-11786
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-11786
Third Party Advisory
http://www.securityfocus.com/bid/101156
Third Party Advisory
http://www.securitytracker.com/id/1039530
Patch
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786
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