Security Updates for Microsoft Skype for Business and Microsoft Lync (November 2018)

medium Nessus Plugin ID 118929

Synopsis

The Microsoft Skype for Business or Microsoft Lync installation on the remote host is missing a security update.

Description

The Microsoft Skype for Business or Microsoft Lync installation on the remote host is missing a security update. It is, therefore, affected by the following vulnerability :

- A denial of service vulnerability exists in Skype for Business. An attacker who successfully exploited the vulnerability could cause Skype for Business to stop responding. Note that the denial of service would not allow an attacker to execute code or to elevate the attacker's user rights. For an attack to be successful, this vulnerability requires that a user sends a number of emojis in the affected version of Skype for Business.
The security update addresses the vulnerability by correcting how Skype for Business handles emojis.
(CVE-2018-8546)

Solution

Microsoft has released the following security updates to address this issue:
-KB4461473
-KB4461487

See Also

http://www.nessus.org/u?2f60e70b

http://www.nessus.org/u?7fddc29c

Plugin Details

Severity: Medium

ID: 118929

File Name: smb_nt_ms18_nov_skype.nasl

Version: 1.6

Type: local

Agent: windows

Published: 11/13/2018

Updated: 4/5/2019

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.4

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2018-8546

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:skype_for_business, cpe:/a:microsoft:lync

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/13/2018

Vulnerability Publication Date: 11/13/2018

Reference Information

CVE: CVE-2018-8546

BID: 105802

MSFT: MS18-4461473, MS18-4461487

MSKB: 4461473, 4461487