Important: .NET 5.0 security and bugfix update

Topic

An update for .NET 5.0 is now available for Red Hat Enterprise Linux 8.

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 5.0.212 and .NET Runtime 5.0.15.

Security Fix(es):

• dotnet: ASP.NET Denial of Service via FormPipeReader (CVE-2022-24464)
• dotnet: double parser stack buffer overrun (CVE-2022-24512)
• brotli: buffer overflow when input chunk is larger than 2GiB (CVE-2020-8927)

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

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64

Fixes

• BZ - 1879225 - CVE-2020-8927 brotli: buffer overflow when input chunk is larger than 2GiB
• BZ - 2061847 - CVE-2022-24464 dotnet: ASP.NET Denial of Service via FormPipeReader
• BZ - 2061854 - CVE-2022-24512 dotnet: double parser stack buffer overrun

CVEs

• CVE-2020-8927
• CVE-2022-24464
• CVE-2022-24512

References

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