Known exploited vulnerability
CVE-2023-38180
The short answer
CVE-2023-38180 affects Microsoft .NET 6.0 and is rated high (CVSS 7.5). CISA added it to the Known Exploited Vulnerabilities catalog on 2023-08-09: attackers are using it, so patch it first. Fixed versions are published for Microsoft.AspNetCore.App.Runtime.win-arm64 (7.0.10, 6.0.21) and Microsoft.AspNetCore.App.Runtime.win-x64 (7.0.10, 6.0.21).
What it is
.NET and Visual Studio Denial of Service Vulnerability
Weakness: CWE-400.
Severity
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploited (CISA KEV)
Yes, since Aug 9, 2023
Federal due date Aug 30, 2023
EPSS, next 30 days
14%
Higher than 97% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Affected packages and fixed versions
| Package | Ecosystem | Fixed in | Advisory |
|---|---|---|---|
| Microsoft.AspNetCore.App.Runtime.win-arm64 | NuGet | 7.0.10, 6.0.21 | GHSA-vmch-3w2x-vhgq |
| Microsoft.AspNetCore.App.Runtime.win-x64 | NuGet | 7.0.10, 6.0.21 | GHSA-vmch-3w2x-vhgq |
| Microsoft.AspNetCore.App.Runtime.win-x86 | NuGet | 7.0.10, 6.0.21 | GHSA-vmch-3w2x-vhgq |
| Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv | NuGet | 6.0.21, 2.1.40 | GHSA-vmch-3w2x-vhgq |
| Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets | NuGet | 2.1.40 | GHSA-vmch-3w2x-vhgq |
Is it in your code? Drop your lockfile into the free vulnerability check, or let vulnerability watch check your repository every day and open the upgrade as a pull request.
Affected products
.NET 6.0, .NET 7.0, ASP.NET Core 2.1, Microsoft Visual Studio 2022 version 17.2, Microsoft Visual Studio 2022 version 17.4, Microsoft Visual Studio 2022 version 17.6. NVD's record lists the exact affected versions.
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38180 PatchVendor Advisory
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CL2L4WE5QRT7WEXANYXSKSU43APC5N2V/ Mailing List
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NWVZFKTLNMNKPZ755EMRYIA6GHFOWGKY/ Mailing List
- msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38180 PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38180 US Government Resource
Questions
Is CVE-2023-38180 being exploited?
Yes. CISA added CVE-2023-38180 to its Known Exploited Vulnerabilities catalog on 2023-08-09, with a federal remediation due date of 2023-08-30.
How do I fix CVE-2023-38180?
Upgrade to a fixed version: Microsoft.AspNetCore.App.Runtime.win-arm64 (NuGet) 7.0.10 or 6.0.21; Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) 7.0.10 or 6.0.21; Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) 7.0.10 or 6.0.21; Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv (NuGet) 6.0.21 or 2.1.40. CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
Related
Latest CVEs this week
Critical and High CVEs from the last 7 days, with KEV and EPSS.
Exploited vulnerabilities by vendor
Every vendor in CISA's KEV catalog, with its count.
Microsoft exploited vulnerabilities
Everything CISA lists as exploited for Microsoft.
Vulnerability watch
A briefing and a fix pull request when an advisory hits your dependencies.
Know the day a CVE lands in your code
Connect a GitHub repository and ZeusQA checks its dependencies daily, briefs each advisory and opens the fix. Three test runs free, no card.