Zero-day vulnerability in Skype for Business Server

Information disclosure
CVE-2023-41763

Vulnerability details

Advisory: SB2023101033 - Information disclosure in Skype for Business server

Vulnerable component: Skype for Business Server

CVE-ID: CVE-2023-41763

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:H/RL:O/RC:C

CWE-ID: CWE-200 - Information exposure

Description:

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application. A remote attacker can gain unauthorized access to IP addresses or port numbers or both to the attacker.

Note, the vulnerability is being actively exploited in the wild.

External links:

https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2023-41763

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.