The terms deprecated and end of support are related but have distinct meanings:
--> Deprecated:When a protocol, software feature, or technology is deprecated, it means it is no longer recommended for use and may be phased out in the future. It is a warning that the technology is outdated, may have security vulnerabilities, or there are better alternatives available. However, the deprecated protocol or feature can still be used, and it may still receive security updates or limited support for a certain period.
Deprecated protocols or features are typically marked to discourage new usage, and developers or administrators are advised to transition to more secure or up-to-date alternatives.
--> End of Support (EoS):
End of support means that the protocol, software, or system will no longer receive any updates, including security patches and technical support from the vendor. This is a more critical stage than deprecation. Continuing to use systems or protocols that have reached end of support can expose them to security risks since vulnerabilities may no longer be addressed.
At this point, the vendor has officially stopped supporting the product, and users are strongly encouraged to migrate to newer versions or alternative solutions to avoid security risks.
--> Key Differences:
Deprecated: Still supported but not recommended for new use.
End of Support: No longer supported, no updates or security patches are provided.
The reason for this post was specifically one famous protocol .. Yes .. I am talking about NTLM.
Per Microsoft:
All versions of NTLM, including LANMAN, NTLMv1, and NTLMv2, are no longer under active feature development and are deprecated. Use of NTLM will continue to work in the next release of Windows Server and the next annual release of Windows. Calls to NTLM should be replaced by calls to Negotiate, which will try to authenticate with Kerberos and only fall back to NTLM when necessary.
Please find the below URL for more details:
https://learn.microsoft.com/en-us/windows/whats-new/deprecated-features
In cybersecurity, using deprecated protocols poses increasing risks over time, but using software that is at the end of support is much riskier, as it will not receive any security fixes.
Happy Learning !!
VulnerabilityManagement CyberSecurity