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CVE-2021-41355

dotnet: System.DirectoryServices.Protocols.LdapConnection sends credentials in plaintext if TLS handshake fails

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Severity

Important

Red Hat Product Security

5.7

CVSS 3.1

Review impact separately from score.

Published · October 13, 2021

Updated · November 22, 2025

Description

A flaw was found in dotnet, where the System.DirectoryServices.Protocols.LdapConnection sends credentials in plaintext if the Transport Layer Security (TLS) handshake fails. This flaw allows an attacker to intercept sensitive information. The highest threat from this vulnerability is to confidentiality.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.7
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CWE-319 · Cleartext Transmission of Sensitive Information