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CVE-2021-26423

HIGH
Published 2021-08-12T18:11:31
Actions:

Expert Analysis

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CVSS Score

V3.1
7.5
/10
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
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2023.03.01
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-01-25
Exploit Probability
Percentile: 0.640
Higher than 64.0% of all CVEs

Attack Vector Metrics

Attack Vector
Not Available
Attack Complexity
Not Available
Privileges Required
Not Available
User Interaction
Not Available
Scope
Not Available

Impact Metrics

Confidentiality
Not Available
Integrity
Not Available
Availability
Not Available

Description

No description available

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Microsoft

Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)

Affected Versions:

15.9.0
Microsoft

Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)

Affected Versions:

16.0
Microsoft

Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)

Affected Versions:

16.0.0
Microsoft

Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)

Affected Versions:

15.0.0
Microsoft

Microsoft Visual Studio 2019 version 16.10 (includes 16.0 - 16.9)

Affected Versions:

16.10.0
Microsoft

Visual Studio 2019 for Mac version 8.10

Affected Versions:

8.1.0
Microsoft

.NET Core 2.1

Affected Versions:

2.1
Microsoft

.NET Core 3.1

Affected Versions:

3.1
Microsoft

.NET 5.0

Affected Versions:

5.0.0
Microsoft

PowerShell Core 7.1

Affected Versions:

7.1.0
Microsoft

PowerShell Core 7.0

Affected Versions:

7.0.0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed HIGH

.NET Core Elevation of Privilege Vulnerability

GHSA-rh58-r7jh-xhx3

Advisory Details

Microsoft is releasing this security advisory to provide information about a vulnerability in .NET 5.0 and .NET Core 3.1. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability. A denial of service vulnerability exists in .NET 5.0, .NET Core 3.1 and .NET Core 2.1 where .NET (Core) server applications providing WebSocket endpoints could be tricked into endlessly looping while trying to read a single WebSocket frame. ### Patches * If you're using .NET 5.0, you should download and install Runtime 5.0.9 or SDK 5.0.206 (for Visual Studio 2019 v16.8) or SDK 5.0.303 (for Visual Studio 2019 V16.10) from https://dotnet.microsoft.com/download/dotnet-core/5.0. * If you're using .NET Core 3.1, you should download and install Runtime 3.1.18 or SDK 3.1.118 (for Visual Studio 2019 v16.4) or 3.1.412 (for Visual Studio 2019 v16.7 or later) from https://dotnet.microsoft.com/download/dotnet-core/3.1. * If you're using .NET Core 2.1, you should download and install Runtime 2.1.29 or SDK 2.1.525 (for Visual Studio 2019 v15.9) or 2.1.817 from https://dotnet.microsoft.com/download/dotnet-core/2.1. #### Other Details - Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/194 - An Issue for this can be found at https://github.com/dotnet/runtime/issues/57175 - MSRC details for this can be found at https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26423

Affected Packages

NuGet Microsoft.NETCore.App.Runtime.win-x86
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.win-x86
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.win-x64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.win-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.win-arm64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.win-arm64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.win-arm
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.win-arm
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.osx-x64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.osx-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.osx-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.osx-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-arm64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.osx-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.LLVM.AOT.linux-arm64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.linux-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.linux-musl-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.linux-arm64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.Mono.linux-arm
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.linux-x64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.linux-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.linux-musl-x64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.linux-musl-x64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.linux-musl-arm64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.linux-musl-arm64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.linux-musl-arm
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.rhel.6-x64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.linux-arm64
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.linux-arm64
ECOSYSTEM: ≥5.0.0 <5.0.9
NuGet Microsoft.NETCore.App.Runtime.linux-arm
ECOSYSTEM: ≥3.1.0 <3.1.18
NuGet Microsoft.NETCore.App.Runtime.linux-arm
ECOSYSTEM: ≥5.0.0 <5.0.9

CVSS Scoring

CVSS Score

7.5

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

WEB https://github.com/dotnet/runtime/security/advisories/GHSA-rh58-r7jh-xhx3
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-26423
WEB https://github.com/dotnet/announcements/issues/194
WEB https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423

Advisory provided by GitHub Security Advisory Database. Published: October 25, 2022, Modified: October 25, 2022

References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26423
Published: 2021-08-12T18:11:31
Last Modified: 2024-08-03T20:26:25.161Z
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