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CVE-2016-6210

5.9 · MEDIUM

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 e…

Published Feb 13, 2017CWE-200EPSS 88.94%

Overview

CVE-2016-6210 is a medium-severity vulnerability. It was published on February 13, 2017 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refseclists.org/fulldisclosure/2016/Jul/51Refwww.debian.org/security/2016/dsa-3626Refwww.securityfocus.com/bid/91812Refwww.securitytracker.com/id/1036319Refaccess.redhat.com/errata/RHSA-2017:2029Refaccess.redhat.com/errata/RHSA-2017:2563Refcert-portal.siemens.com/productcert/pdf/ssa-412672.pdfRefsecurity.gentoo.org/glsa/201612-18Refsecurity.netapp.com/advisory/ntap-20190206-0001/Refwww.exploit-db.com/exploits/40113/

How CyberStrike helps

Frequently asked questions

What is CVE-2016-6210?

CVE-2016-6210 is a medium-severity vulnerability. It was published on February 13, 2017 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2016-6210?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-6210?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-6210?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-6210 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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