Affected: AlmaLinux:9: aspnetcore-runtime-7.0, AlmaLinux:9: aspnetcore-targeting-pack-7.0, AlmaLinux:9: dotnet-apphost-pack-7.0, AlmaLinux:9: dotnet-host, AlmaLinux:9: dotnet-hostfxr-7.0, AlmaLinux:9: dotnet-runtime-7.0, AlmaLinux:9: dotnet-sdk-7.0, AlmaLinux:9: dotnet-sdk-7.0-source-built-artifacts, AlmaLinux:9: dotnet-targeting-pack-7.0, AlmaLinux:9: dotnet-templates-7.0 and 1 more

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

New versions of .NET that address a security vulnerability are now available. The updated versions are .NET SDK 7.0.110 and .NET Runtime 7.0.10.

Security Fix(es):

* dotnet: RCE under dotnet commands (CVE-2023-35390) * dotnet: Kestrel vulnerability to slow read attacks leading to Denial of Service attack (CVE-2023-38180)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected: Bitnami: dotnet

.NET and Visual Studio Denial of Service Vulnerability

Affected: CleanStart: dotnet6-build, CleanStart: dotnet6-runtime

CVE-2023-38180 affects multiple packages. . See references for individual vulnerability details.

.NET and Visual Studio Denial of Service Vulnerability

Affected: NuGet: Microsoft.AspNetCore.App.Runtime.win-arm64, NuGet: Microsoft.AspNetCore.App.Runtime.win-x64, NuGet: Microsoft.AspNetCore.App.Runtime.win-x86, NuGet: Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv, NuGet: Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets

# Microsoft Security Advisory CVE-2023-38180: .NET Denial of Service Vulnerability

## <a name="executive-summary"></a>Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core 2.1, .NET 6.0, and .NET 7.0. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A vulnerability exists in Kestrel where, on detecting a potentially malicious client, Kestrel will sometimes fail to disconnect it, resulting in denial of service.

## Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/269

### <a name="mitigation-factors"></a>Mitigation factors

If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF

## <a name="affected-software"></a>Affected software

* Any .NET 7.0 application running on .NET 7.0.8 or earlier. * Any .NET 6.0 application running on .NET 6.0.19 or earlier.

If your application uses the following package versions, ensure you update to the latest version of .NET.

### <a name=".NET 7"></a>.NET 7

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.AspNetCore.App.Runtime.win-arm64](https://www.nuget.org/packages/Microsoft.AspNetCore.App.Runtime.win-arm64) | >= 7.0.0, <= 7.0.9 |…

An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault. An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked. A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. Policy processing is disabled by default but can be enabled by passing the `-policy` argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()` function. Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks. Invalid certificate policies in leaf certificates are silently ignored by OpenSSL and other certificate policy checks are skipped for that certificate. A malicious CA could use this to deliberately assert invalid certificate policies in order to circumvent…

dotnet: RCE under dotnet commands dotnet: Kestrel vulnerability to slow read attacks leading to Denial of Service attack

dotnet: RCE under dotnet commands dotnet: Kestrel vulnerability to slow read attacks leading to Denial of Service attack

Affected: Ubuntu:22.04:LTS: dotnet6, Ubuntu:22.04:LTS: dotnet7

.NET and Visual Studio Denial of Service Vulnerability