Microsoft QUIC Denial of Service Vulnerability
Released: Oct 10, 2023
Last updated: Dec 10, 2024
- Assigning CNA
- Microsoft
- CVE.org link
- CVE-2023-38171
- Impact
- Denial of Service
- Max Severity
- Important
- Weakness
- CVSS Source
- Microsoft
- Vector String
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
- Metrics
- CVSS:3.1 7.5 / 6.5Base score metrics: 7.5 / Temporal score metrics: 6.5
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Exploit Code Maturity
Unproven
Remediation Level
Official Fix
Report Confidence
Confirmed
Please see Common Vulnerability Scoring System for more information on the definition of these metrics.
Exploitability
The following table provides an exploitability assessment for this vulnerability at the time of original publication.
- Publicly disclosed
- No
- Exploited
- No
- Exploitability assessment
- Exploitation More Likely
FAQ
Where can I find more information?
Please see the GitHub Advisory relating to this vulnerability here: https://github.com/microsoft/msquic/security/advisories/GHSA-xh5m-8qqp-c5x7#event-111621
Acknowledgements
- ziming zhang with Ant Security Light-Year Lab
Security Updates
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle.
- 10.0.22621.2428
- 10.0.22621.2428
- 10.0.22000.2538
- 10.0.22000.2538
- 10.0.20348.2031
- 17.7.6
- 17.6.9
- 17.4.13
- 17.2.21
Disclaimer
Revisions
To comprehensively address CVE-2023-38171, Microsoft released security updates on October 24, 2023 for all affected versions of .NET and Microsoft Visual Studio.
Microsoft recommends that customers running any of these products install the updates to be fully protected from the vulnerability. Customers whose systems are configured to receive automatic updates do not need to take any further action.
Revised the Security Updates table to include PowerShell 7.3 because this version of PowerShell 7 is affected by this vulnerability. See https://github.com/PowerShell/Announcements/issues/53 for more information.
Information published.