CVE-2021-34532: ASP.NET Core and Visual Studio Information Disclosure Vulnerability

Overview

Severity

Medium (CVSS 5.5)

CVSS Vector

CVSS:3.1/AV:L/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

2021-Aug

Released

2021-08-10

Last Updated

2021-08-10

EPSS Score

1.21% (percentile: 66.7%)

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 data inside the targeted website like IDs, tokens, cryptographic nonces, and other sensitive information.

Affected Products (8)

Developer Tools

• ASP.NET Core 2.1
• ASP.NET Core 3.1
• ASP.NET Core 5.0
• Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
• Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)
• Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)
• Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)
• Visual Studio 2019 for Mac version 8.10

Security Updates (8)

• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes
• Release Notes

Revision History

• 2021-08-10: Information published.
• 2021-08-10: In the Security Updates table, added links to the Release Notes. This is an informational change only.