Privilege escalation in Skype for Business - CVE-2017-11786
Published: October 10, 2017 / Updated: October 10, 2017
Vulnerability identifier: #VU8757
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-11786
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote authenticated attacker to gain elevated privileges on the target system.
The weakness exists due to when Skype for Business fails to properly handle specific authentication requests. A remote attacker can invite a user to an instant message session while using a malicious profile image, steal an authentication has and gain system privileges.
Affected software
Skype for Business
Microsoft Lync
Microsoft Lync
How to mitigate CVE-2017-11786
Install updates from vendor's website.