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9.3
HIGH CVSS 2.0
CVE-2017-11786
Microsoft Skype for Business Elevation of Privilege Vulnerability
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."

INFO

Published Date :

Oct. 13, 2017, 1:29 p.m.

Last Modified :

April 20, 2025, 1:37 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2017-11786 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Microsoft office
2 Microsoft lync
3 Microsoft skype_for_business
: Total Affected Vendor : 1 | Products : 3
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 HIGH [email protected]
CVSS 3.0 HIGH [email protected]
Solution
This information is provided by the 3rd party feeds.
  • Microsoft has released the following security updates to address this issue: -KB4011159 -KB4011179
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2017-11786.

URL Resource
http://www.securityfocus.com/bid/101156 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039530 Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786 Patch Vendor Advisory
http://www.securityfocus.com/bid/101156 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1039530 Third Party Advisory VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786 Patch Vendor Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2017-11786 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2017-11786 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2017-11786 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2017-11786 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://www.securityfocus.com/bid/101156
    Added Reference http://www.securitytracker.com/id/1039530
    Added Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Oct. 03, 2019

    Action Type Old Value New Value
    Changed CWE CWE-264 CWE-294
  • Initial Analysis by [email protected]

    Nov. 03, 2017

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:M/Au:N/C:C/I:C/A:C)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Changed Reference Type http://www.securitytracker.com/id/1039530 No Types Assigned http://www.securitytracker.com/id/1039530 Third Party Advisory, VDB Entry
    Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786 Patch, Vendor Advisory
    Changed Reference Type http://www.securityfocus.com/bid/101156 No Types Assigned http://www.securityfocus.com/bid/101156 Third Party Advisory, VDB Entry
    Added CWE CWE-264
    Added CPE Configuration OR *cpe:2.3:a:microsoft:lync:2013:sp1:*:*:*:*:*:* *cpe:2.3:a:microsoft:skype_for_business:2016:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Oct. 15, 2017

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1039530 [No Types Assigned]
    Added Reference http://www.securityfocus.com/bid/101156 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 9.3
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

11.49 }} -8.55%

score

0.93326

percentile