Openssh · Openssh · CVE-2016-6210
**Name of the Vulnerable Software and Affected Versions**
OpenSSH versions prior to 7.3
**Description**
The issue is related to a password hashing error in the ssh network protocol. When SHA256 or SHA512 are used for user password hashing, a timing difference in responses can be leveraged by remote attackers to enumerate users, especially when a large password is provided. This can potentially allow attackers to gain access to confidential data. Additionally, the lack of password length limits for password authentication can cause a denial of service due to excessive CPU consumption when a long string is used.
**Recommendations**
For OpenSSH versions prior to 7.3, update to version 7.3 or later to resolve the issue.
As a temporary workaround, consider restricting access to the ssh service to minimize the risk of exploitation.
Avoid using excessively long passwords for authentication until the issue is resolved.