Vulnerability · Published Jan 10, 2023 · Assigned by microsoft
CVE-2023-21538.NET Denial of Service Vulnerability
High 7.5
In plain English
A high-severity unsafe deserialization in .NET 6.0 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 87% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)2.8%top 13.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
.NET Denial of Service Vulnerability
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | aspnetcore-runtime-6.0 | 6.0.13-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | aspnetcore-runtime-6.0 | 6.0.13-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | aspnetcore-targeting-pack-6.0 | 6.0.13-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | aspnetcore-targeting-pack-6.0 | 6.0.13-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | dotnet-apphost-pack-6.0 | 6.0.13-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | dotnet-apphost-pack-6.0 | 6.0.13-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | dotnet-hostfxr-6.0 | 6.0.13-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | dotnet-hostfxr-6.0 | 6.0.13-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | dotnet-runtime-6.0 | 6.0.13-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | dotnet-runtime-6.0 | 6.0.13-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | dotnet-sdk-6.0 | 6.0.113-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | dotnet-sdk-6.0 | 6.0.113-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | dotnet-sdk-6.0-source-built-artifacts | 6.0.113-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | dotnet-sdk-6.0-source-built-artifacts | 6.0.113-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | dotnet-targeting-pack-6.0 | 6.0.13-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | dotnet-targeting-pack-6.0 | 6.0.13-1.el9_1 | ALSA-2023:0077 |
| AlmaLinux:8 | dotnet-templates-6.0 | 6.0.113-1.el8_7 | ALSA-2023:0079 |
| AlmaLinux:9 | dotnet-templates-6.0 | 6.0.113-1.el9_1 | ALSA-2023:0077 |
| Alpine:v3.20 | dotnet6-build | 6.0.113-r0 | ALPINE-CVE-2023-21538 |
| Alpine:v3.20 | dotnet6-runtime | 6.0.13-r0 | ALPINE-CVE-2023-21538 |
| NuGet | microsoft.netcore.app.runtime.linux-arm | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.linux-arm64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.linux-musl-arm64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.linux-musl-x64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.linux-x64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.osx-arm64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.osx-x64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.win-arm | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.win-arm64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.win-x64 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| NuGet | microsoft.netcore.app.runtime.win-x86 | 6.0.13 | GHSA-8f7f-vqg5-jrv9 |
| Rocky Linux:8 | dotnet6.0 | 0:6.0.113-1.el8_7 | RLSA-2023:0079 |
| Rocky Linux:9 | dotnet6.0 | 0:6.0.113-1.el9_1 | RLSA-2023:0077 |
| Ubuntu:22.04:LTS | dotnet6 | 6.0.113-0ubuntu1~22.04.1 | USN-5798-1 |
| Ubuntu:22.04:LTS | dotnet6 | 6.0.113-0ubuntu1~22.04.1 | UBUNTU-CVE-2023-21538 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .NET 6.0 | 6.0.0 – before 6.0.13 |
| Microsoft | PowerShell 7.2 | 7.2.0 – before 7.2.9 |
Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
References
- .NET Denial of Service Vulnerability vendor-advisory