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Red Hat: RHSA-2021-2037-01 Critical: DotNet 3.1 Privilege Escalation

red hat
Calendar Grey May 19, 2021
Dist Redhat Esm H88
Important announcement regarding dotnet3.1 on Red Hat Enterprise Linux aimed at mitigating security risks that impact applications.
An update for .NET Core 3.1 is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Summary

.NET Core 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 Core that address a security vulnerability are now available. The updated versions are .NET Core SDK 3.1.115 and .NET Core Runtime 3.1.15.
Security Fix(es):
* dotnet: .NET Core single-file application privilege escalation (CVE-2021-31204)
In order for the update to be complete, self-contained applications deployed using previous versions need to be recompiled and redeployed.
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.

Topics%20covered

Topics Covered

security advisory critical software update privilege escalation important red hat enterprise dotnet framework

References

https://access.redhat.com/security/cve/CVE-2021-31204 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: dotnet3.1-3.1.115-1.el8_4.src.rpm
x86_64: aspnetcore-runtime-3.1-3.1.15-1.el8_4.x86_64.rpm aspnetcore-targeting-pack-3.1-3.1.15-1.el8_4.x86_64.rpm dotnet-apphost-pack-3.1-3.1.15-1.el8_4.x86_64.rpm dotnet-apphost-pack-3.1-debuginfo-3.1.15-1.el8_4.x86_64.rpm dotnet-hostfxr-3.1-3.1.15-1.el8_4.x86_64.rpm dotnet-hostfxr-3.1-debuginfo-3.1.15-1.el8_4.x86_64.rpm dotnet-runtime-3.1-3.1.15-1.el8_4.x86_64.rpm dotnet-runtime-3.1-debuginfo-3.1.15-1.el8_4.x86_64.rpm dotnet-sdk-3.1-3.1.115-1.el8_4.x86_64.rpm dotnet-sdk-3.1-debuginfo-3.1.115-1.el8_4.x86_64.rpm dotnet-targeting-pack-3.1-3.1.15-1.el8_4.x86_64.rpm dotnet-templates-3.1-3.1.115-1.el8_4.x86_64.rpm dotnet3.1-debuginfo-3.1.115-1.el8_4.x86_64.rpm dotnet3.1-debugsource-3.1.115-1.el8_4.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:2037-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:2037
Issue date: 2021-05-19

Topic

An update for .NET Core 3.1 is now available for Red Hat Enterprise Linux8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory critical software update privilege escalation important red hat enterprise dotnet framework

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - x86_64

Bugs Fixed

1956815 - CVE-2021-31204 dotnet: .NET Core single-file application privilege escalation

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