RHSA-2021:3143 - Security Advisory

Topic

An update for .NET Core 3.1 is now available for .NET Core on Red Hat Enterprise Linux.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

.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 security vulnerabilities are now available. The updated versions are .NET SDK 3.1.118 and .NET Runtime 3.1.18.

Security Fix(es):

• dotnet: ASP.NET Core WebSocket frame processing DoS (CVE-2021-26423)
• dotnet: Dump file created world-readable (CVE-2021-34485)
• dotnet: ASP.NET Core JWT token logging (CVE-2021-34532)

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.

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

Affected Products

• dotNET on RHEL (for RHEL Server) 1 x86_64
• dotNET on RHEL (for RHEL Workstation) 1 x86_64
• dotNET on RHEL (for RHEL Compute Node) 1 x86_64

Fixes

• BZ - 1990286 - CVE-2021-34485 dotnet: Dump file created world-readable
• BZ - 1990295 - CVE-2021-26423 dotnet: ASP.NET Core WebSocket frame processing DoS
• BZ - 1990300 - CVE-2021-34532 dotnet: ASP.NET Core JWT token logging

CVEs

• CVE-2021-26423
• CVE-2021-34485
• CVE-2021-34532

References

• https://access.redhat.com/security/updates/classification/#important