CVE-2024-20695: Skype for Business Information Disclosure Vulnerability

Overview

Severity
Medium (CVSS 5.7)
CVSS Vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Category
Information Disclosure
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2024-Feb
Released
2024-02-13
EPSS Score
0.12% (percentile: 31.4%)

FAQ

What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is file content. According to the CVSS metric, privileges required is low (PR:L). What does that mean for this vulnerability? Any authenticated attacker could trigger this vulnerability. It does not require admin or other elevated privileges. According to the CVSS metric, the attack vector is adjacent (AV:A). What does that mean for this vulnerability? This vulnerability's attack is limited at the protocol level to a logically adjacent topology. This means it cannot simply be done across the internet, but instead needs something specific tied to the target. Good examples would include the same shared physical network (such as Bluetooth or IEEE 802.11), logical network (local IP subnet), or from within a secure or otherwise limited administrative domain (MPLS, secure VPN to an administrative network zone). This is common to many attacks that require machine-in-the-middle (MITM) type setups or that rely on initially gaining a foothold in another environment. There is no download information for Skype for Business Server 2019 CU7 in the Security Updates table. How do I protect myself from this vulnerability? Follow the steps to create a file share as outlined in Create a file share in Skype for Business Server.

Affected Products (1)

Microsoft Office

  • Skype for Business Server 2019 CU7

Acknowledgments

Fin Hume with WithSecure

Revision History

  • 2024-02-13: Information published.