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OpenSSH Denial of Service And User Enumeration Vulnerabilities (Windows)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
This host is installed with openssh and is prone to denial of service and user enumeration vulnerabilities.
Insight
Insight
Multiple flaws exist due to, - The auth_password function in 'auth-passwd.c' script does not limit password lengths for password authentication. - The sshd in OpenSSH, when SHA256 or SHA512 are used for user password hashing uses BLOWFISH hashing on a static password when the username does not exist and it takes much longer to calculate SHA256/SHA512 hash than BLOWFISH hash.
Affected Software
Affected Software
OpenSSH versions before 7.3 on Windows
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Upgrade to OpenSSH version 7.3 or later.