Detections
Analytics
Security Updates for Microsoft Skype for Business and Microsoft Lync (July 2018)
high Nessus Plugin ID 111045
Language:
Synopsis
The Microsoft Skype for Business or Microsoft Lync installation on the remote host is affected by multiple vulnerabilities.Description
The Microsoft Skype for Business or Microsoft Lync installation on the remote host is missing security updates.It is, therefore, affected by multiple vulnerabilities :
- A security feature bypass vulnerability exists when Skype for Business or Lync do not properly parse UNC path links shared via messages. An attacker who successfully exploited the vulnerability could execute arbitrary commands in the context of the logged-in user.
The security feature bypass by itself does not allow arbitrary code execution. Instead, an attacker would have to convince users to click a link to a file. In a file-sharing attack scenario, an attacker could provide a specially-crafted file designed to exploit the vulnerability, and then convince a user to click the link to the file. The update addresses the vulnerability by correcting how Skype for Business and Lync handle links to UNC paths. (CVE-2018-8238)
- A remote code execution vulnerability exists when Skype for Business and Microsoft Lync clients fail to properly sanitize specially crafted content. The vulnerability could corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. (CVE-2018-8311)
Solution
Microsoft has released the following security updates to address this issue:-KB4022221
-KB4022225
See Also
Plugin Details
Severity: High
ID: 111045
File Name: smb_nt_ms18_jul_skype.nasl
Version: 1.6
Type: local
Agent: windows
Family: Windows : Microsoft Bulletins
Published: 7/13/2018
Updated: 9/5/2024
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: High
Base Score: 9.3
Temporal Score: 6.9
Vector: CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2018-8238
CVSS v3
Risk Factor: High
Base Score: 8.8
Temporal Score: 7.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2018-8311
Vulnerability Information
CPE: cpe:/a:microsoft:lync, cpe:/a:microsoft:skype_for_business
Required KB Items: SMB/MS_Bulletin_Checks/Possible
Exploit Ease: No known exploits are available
Patch Publication Date: 7/10/2018
Vulnerability Publication Date: 7/10/2018
Reference Information
CVE: CVE-2018-8238, CVE-2018-8311