CVE-2023-36435 — Vulnerability in...

HIGH

MsQuic Remote Denial of Service Vulnerability

Published October 10, 2023Updated June 3, 2024Source: osv

Summary

### Impact The MsQuic server will continue to leak memory until no more is available, resulting in a denial of service. ### Patches The following patch was made: - Fix Memory Leak from Multiple Decodes of TP - https://github.com/microsoft/msquic/commit/d364feeda0dd8b729eca6fef149c1ef98630f0cb ### Workarounds Beyond upgrading to the patched versions, there is no other workaround.

Advisory Timeline

First published October 10, 2023 (1097 days ago).
Last revised June 3, 2024 — 237 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Microsoft.Native.Quic.MsQuic.Schannel to 2.2.3 or later

dotnet add package Microsoft.Native.Quic.MsQuic.Schannel --version 2.2.3

NuGet

Update Microsoft.Native.Quic.MsQuic.OpenSSL to 2.2.3 or later

dotnet add package Microsoft.Native.Quic.MsQuic.OpenSSL --version 2.2.3

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: nuget (2).

Package	Ecosystem	Affected	Fixed In
Microsoft.Native.Quic.MsQuic.Schannel	nuget	1.8.0	2.2.3
Microsoft.Native.Quic.MsQuic.OpenSSL	nuget	1.8.0	2.2.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-400
Uncontrolled Resource ConsumptionMITRE
CWE-401
Memory LeakMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

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

References

Frequently Asked Questions

What is CVE-2023-36435?: MsQuic Remote Denial of Service Vulnerability This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2023-36435?: CVE-2023-36435 affects Microsoft.Native.Quic.MsQuic.Schannel and Microsoft.Native.Quic.MsQuic.OpenSSL. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2023-36435 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-fr44-546p-7xcp

BIT-dotnet-2023-36435

BIT-dotnet-sdk-2023-36435

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