Vulnerability · Published Aug 12, 2021 · Assigned by microsoft
CVE-2021-34532ASP.NET Core and Visual Studio Information Disclosure Vulnerability
Medium 5.5
In plain English
A medium-severity security flaw in ASP.NET Core 2.1 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)1.2%top 31.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
ASP.NET Core and Visual Studio Information Disclosure Vulnerability
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| NuGet | microsoft.aspnetcore.authentication.jwtbearer | 2.1.29 | GHSA-q7cg-43mg-qp69 |
| NuGet | microsoft.aspnetcore.authentication.jwtbearer | 3.1.18 | GHSA-q7cg-43mg-qp69 |
| NuGet | microsoft.aspnetcore.authentication.jwtbearer | 5.0.9 | GHSA-q7cg-43mg-qp69 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | ASP.NET Core 2.1 | 2.0 – before 2.1.29 |
| Microsoft | ASP.NET Core 3.1 | 3.0 – before 3.1.18 |
| Microsoft | ASP.NET Core 5.0 | 5.0 – before 5.0.9 |
| Microsoft | Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9) | 16.10.0 – before 16.10.5 |
| Microsoft | Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3) | 16.0 – before 16.4.25 |
| Microsoft | Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6) | 16.0.0 – before 16.7.18 |
| Microsoft | Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8) | 15.0.0 – before 16.9.10 |
| Microsoft | Visual Studio 2019 for Mac version 8.10 | 8.1.0 – before 8.10.7 |
References
- ASP.NET Core and Visual Studio Information Disclosure Vulnerability vendor-advisory, patch
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34532 x_refsource_MISC, x_transferred