QID 38909

Date Published: 2023-09-28

QID 38909: SHA1 deprecated setting for SSH

The SSH protocol (Secure Shell) is a method for secure remote login from one computer to another. The target is using deprecated SHA1 cryptographic settings to communicate.

vulnerable to collision attacks, which are designed to fabricate the same hash value for different input data.each hash is supposedly unique.

CVSS V3 rated as Medium - 3.7 severity.

CVSS V2 rated as Low - 2.6 severity.

Solution

Avoid using deprecated cryptographic settings.

Use best practices when configuring SSH.

Refer to NIST Retires SHA-1 Cryptographic Algorithm (SSH) .

Settings currently considered deprecated:

1.Key exchange algorithms:
diffie-hellman-group1-sha1, rsa1024sha1, diffie-hellman-group14-sha1, diffie-hellman-group-exchange-sha1, gss-gex-sha1-*, gss-group1-sha1-* and gss-group14-sha1-*.

2.MAC:
hmac-sha1, hmac-sha1-96, [email protected], [email protected]

3.Host key:
ssh-rsa, ssh-dss, [email protected], [email protected]

Vendor References

CVEs related to QID 38909

Software Advisories

Advisory ID	Software	Component	Link

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