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Category:   Application (Instant Messaging/IRC/Chat)  >   Microsoft Lync Vendors:   Microsoft
Microsoft Lync for Mac Lets Remote Users Bypass Security Restrictions and Download Files to the Target System
SecurityTracker Alert ID:  1041633
SecurityTracker URL:  http://securitytracker.com/id/1041633
CVE Reference:   CVE-2018-8474   (Links to External Site)
Date:  Sep 11 2018
Impact:   Modification of system information
Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Microsoft Lync. A remote user can bypass security controls on the target system.

A remote user can send a specially crafted message to the target user to bypass security controls and cause file types that are listed on the target user's safe file type list to be downloaded to the target user's system.

Paul Burkeland of TrustedSec reported this vulnerability.

Impact:   A remote user can bypass security controls and cause files to be downloaded to the target user's system.
Solution:   No solution was available at the time of this entry.

The vendor does not plan to fix this vulnerability and, instead, recommends upgrading to Skype for Business on Mac.

The Microsoft advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8474

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8474 (Links to External Site)
Cause:   Access control error
Underlying OS:  UNIX (macOS/OS X)

Message History:   None.


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