Arch Linux Security Advisory ASA-202105-21

Severity: Medium
Date : 2021-05-25
CVE-ID : CVE-2021-31204
Package : dotnet-runtime
Type : privilege escalation
Remote : No
Link : https://security.archlinux.org/AVG-1944

Summary

The package dotnet-runtime before version 5.0.6.sdk203-1 is vulnerable
to privilege escalation.

Resolution

Upgrade to 5.0.6.sdk203-1.

pacman -Syu “dotnet-runtime>=5.0.6.sdk203-1”

The problem has been fixed upstream in version 5.0.6.sdk203.

Workaround

None.

Description

An elevation of privilege vulnerability exists in .NET 5.0 and .NET
Core 3.1 when a user runs a single file application on operating
systems based on Linux or macOS. The issue is fixed in .NET 5.0,
Runtime 5.0.6 and SDK 5.0.203, as well as .NET Core 3.1, Runtime 3.1.15
and SDK 3.1.115.

Impact

An attacker could elevate privileges from a crafted single file
application.

References

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-31204
https://github.com/dotnet/announcements/issues/185
https://security.archlinux.org/CVE-2021-31204