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."
Published 2017-10-13 13:29:01
Updated 2019-10-03 00:03:26
View at NVD,   CVE.org
Vulnerability category: Gain privilege

Threat overview for CVE-2017-11786

Top countries where our scanners detected CVE-2017-11786
Top open port discovered on systems with this issue 443
IPs affected by CVE-2017-11786 1,298
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2017-11786!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2017-11786

0.59%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 76 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-11786

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
9.3
HIGH AV:N/AC:M/Au:N/C:C/I:C/A:C
8.6
10.0
NIST
8.8
HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
2.8
5.9
NIST

CWE ids for CVE-2017-11786

  • A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2017-11786

Products affected by CVE-2017-11786

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