CWE
200
Advisory Published
CVE Published
Updated

CVE-2016-6210: Infoleak

First published: Mon Jul 18 2016(Updated: )

sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
OpenSSH<=7.2

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Frequently Asked Questions

  • What is the severity of CVE-2016-6210?

    CVE-2016-6210 is considered a medium severity vulnerability due to the potential for user enumeration attacks.

  • How do I fix CVE-2016-6210?

    To fix CVE-2016-6210, upgrade OpenSSH to version 7.3 or later where SHA256 or SHA512 hashing is implemented correctly.

  • What systems are affected by CVE-2016-6210?

    CVE-2016-6210 affects OpenSSH versions prior to 7.3, particularly version 7.2 and earlier.

  • Can CVE-2016-6210 lead to a security breach?

    Yes, CVE-2016-6210 can lead to a security breach as it allows remote attackers to enumerate valid usernames.

  • What mitigations are available for CVE-2016-6210?

    Mitigations for CVE-2016-6210 include employing additional controls such as account lockouts and using different hashing algorithms.

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