Vulnerability identifier: #VU62279

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-26910

CWE-ID: CWE-451

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Skype for Business Server
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data in Skype for Business and Lync. A remote attacker can make a specially crafted network call to the target Skype for Business server and disclose IP addresses or port numbers.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Skype for Business Server: 2015 CU12 - 2019 CU6

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-26910

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.