CVE-2017-11786 - Authentication Bypass by Capture-replay

Severity

93%

Complexity

86%

Confidentiality

165%

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."

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 3.0 Base Score 8.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 9.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:C/I:C/A:C).

Overview

Type

Microsoft

First reported 7 years ago

2017-10-13 13:29:00

Last updated 5 years ago

2019-10-03 00:03:00

Affected Software

Microsoft Lync 2013 SP1

2013

Microsoft Skype for Business 2016

2016

References

101156

Third Party Advisory, VDB Entry

1039530

Third Party Advisory, VDB Entry

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11786

Patch, Vendor Advisory

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