CVE-2019-1301 High severity vulnerability that affects System.Management.Automation

High 7.5 Published Updated

Attackers can cause a denial of service in .NET Core applications by sending improperly handled web requests.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Over the internet
Victim action needed
Not needed
Fix
Available

What is CVE-2019-1301?

CVE-2019-1301 is a high-severity denial of service vulnerability in Microsoft .NET Core, published on 11 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A denial of service vulnerability exists when .NET Core improperly handles web requests, aka '.NET Core Denial of Service Vulnerability'.

Which versions are affected by CVE-2019-1301?

4 open source packages ship an affected version, including System.Management.Automation. It affects 2 products.

PackageAffectedFixed in
System.Management.Automation NuGetFrom 6.0.06.1.6
System.Management.Automation NuGetFrom 6.0.06.1.6
System.Management.Automation NuGetFrom 6.2.06.2.3
System.Management.Automation NuGetFrom 6.2.06.2.3
Linux distribution packages (29)
dotnet Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.509-1.el8_0
dotnet-debuginfo Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.509-1.el8_0
dotnet-debugsource Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.509-1.el8_0
dotnet-host Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.13-1.el8_0
dotnet-host-debuginfo Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.13-1.el8_0
dotnet-host-fxr-2.1 Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.13-1.el8_0
dotnet-host-fxr-2.1-debuginfo Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.13-1.el8_0
dotnet-runtime-2.1 Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.13-1.el8_0
dotnet-runtime-2.1-debuginfo Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.13-1.el8_0
dotnet-sdk-2.1 Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.509-1.el8_0
dotnet-sdk-2.1.5xx Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.509-1.el8_0
dotnet-sdk-2.1.5xx-debuginfo Red Hat:enterprise_linux:8::appstreamAll versions0:2.1.509-1.el8_0
rh-dotnet21 Red Hat:rhel_dotnet:2.1::el7All versions0:2.1-12.el7
rh-dotnet21-dotnet Red Hat:rhel_dotnet:2.1::el7All versions0:2.1.509-1.el7
rh-dotnet21-dotnet-debuginfo Red Hat:rhel_dotnet:2.1::el7All versions0:2.1.509-1.el7
rh-dotnet21-dotnet-host Red Hat:rhel_dotnet:2.1::el7All versions0:2.1.13-1.el7
rh-dotnet21-dotnet-runtime-2.1 Red Hat:rhel_dotnet:2.1::el7All versions0:2.1.13-1.el7
rh-dotnet21-dotnet-sdk-2.1 Red Hat:rhel_dotnet:2.1::el7All versions0:2.1.509-1.el7
rh-dotnet21-dotnet-sdk-2.1.5xx Red Hat:rhel_dotnet:2.1::el7All versions0:2.1.509-1.el7
rh-dotnet21-runtime Red Hat:rhel_dotnet:2.1::el7All versions0:2.1-12.el7
rh-dotnet22 Red Hat:rhel_dotnet:2.2::el7All versions0:2.2-9.el7
rh-dotnet22-dotnet Red Hat:rhel_dotnet:2.2::el7All versions0:2.2.109-1.el7
rh-dotnet22-dotnet-debuginfo Red Hat:rhel_dotnet:2.2::el7All versions0:2.2.109-1.el7
rh-dotnet22-dotnet-host Red Hat:rhel_dotnet:2.2::el7All versions0:2.2.7-1.el7
rh-dotnet22-dotnet-host-fxr-2.2 Red Hat:rhel_dotnet:2.2::el7All versions0:2.2.7-1.el7
rh-dotnet22-dotnet-runtime-2.2 Red Hat:rhel_dotnet:2.2::el7All versions0:2.2.7-1.el7
rh-dotnet22-dotnet-sdk-2.2 Red Hat:rhel_dotnet:2.2::el7All versions0:2.2.109-1.el7
rh-dotnet22-dotnet-sdk-2.2.1xx Red Hat:rhel_dotnet:2.2::el7All versions0:2.2.109-1.el7
rh-dotnet22-runtime Red Hat:rhel_dotnet:2.2::el7All versions0:2.2-9.el7

Products include Microsoft .Net Core, Microsoft Powershell Core.

How do I fix CVE-2019-1301?

Upgrade System.Management.Automation to a fixed version for your release line: 6.1.6 or 6.2.3.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-1301 being exploited?

There is no known exploitation of CVE-2019-1301 in the wild and no public exploit code.

Sources

Also known as GHSA-62gw-3rmj-wmp2, RHSA-2019:2731, RHSA-2019:2732.

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