Microsoft is releasing this security advisory to provide information about a vulnerability in .NET. This advisory also provides guidance on what developers can do to update their applications to remove this vulnerability.

A Information Disclosure vulnerability exists in .NET where System.DirectoryServices.Protocols.LdapConnection may send credentials in plain text on Linux.

Patches

Any .NET application that uses System.DirectoryServices.Protocols with a vulnerable version listed below on system based on Linux.

Other Details

• Announcement for this issue can be found at dotnet/announcements#202
• An Issue for this can be found at dotnet/runtime#60301
• MSRC details for this can be found at https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-41355

References

• GHSA-9cxh-gqpx-qc5m
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-41355
• dotnet/runtime#60301
• https://nvd.nist.gov/vuln/detail/CVE-2021-41355
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41355
• https://www.oracle.com/security-alerts/cpujan2022.html