A dotnet-runtime security update has been released for Arch Linux.

ASA-202103-16: dotnet-runtime: multiple issues

Arch Linux Security Advisory ASA-202103-16
=========================================
Severity: High
Date : 2021-03-25
CVE-ID : CVE-2021-1721 CVE-2021-1723 CVE-2021-24112
Package : dotnet-runtime
Type : multiple issues
Remote : Yes
Link :   https://security.archlinux.org/AVG-1449

Summary
======
The package dotnet-runtime before version 5.0.3.sdk103-2 is vulnerable
to multiple issues including arbitrary code execution and denial of
service.

Resolution
=========
Upgrade to 5.0.3.sdk103-2.

# pacman -Syu "dotnet-runtime>=5.0.3.sdk103-2"

The problems have been fixed upstream in version 5.0.3.sdk103.

Workaround
=========
None.

Description
==========
- CVE-2021-1721 (denial of service)

A security issue was found in dotnet-core before version 3.1.12. A
denial-of-service vulnerability exists when creating HTTPS web request
during X509 certificate chain building.

- CVE-2021-1723 (denial of service)

A flaw was found in dotnet-core before version 3.1.11. Running
callbacks outside of locks results in Krestel deadlock using HTTP2.

- CVE-2021-24112 (arbitrary code execution)

A remote code execution vulnerability exists in dotnet-core before
version 3.1.12 when parsing certain types of graphics files. This
vulnerability only exists on systems running on MacOS or Linux.

Impact
=====
A malicious client can send crafted HTTP requests and crash the server,
or execute arbitrary code by reading a crafted file.

References
=========
  https://bugs.archlinux.org/task/69317
  https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1721
  https://github.com/dotnet/announcements/issues/175
  https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-1723
  https://github.com/dotnet/announcements/issues/170
  https://github.com/dotnet/aspnetcore/commit/20ad9fa5dcde635c13c6c83806c4701d5b7ec21e
  https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-24112
  https://github.com/dotnet/announcements/issues/176
  https://security.archlinux.org/CVE-2021-1721
  https://security.archlinux.org/CVE-2021-1723
  https://security.archlinux.org/CVE-2021-24112