sshd in OpenSSH before 7.3, when SHA256 or SHA512 are...
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
Am I Vulnerable?
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://access.redhat.com/errata/RHSA-2017:2563
- http://www.securitytracker.com/id/1036319
- http://seclists.org/fulldisclosure/2016/Jul/51
- http://www.debian.org/security/2016/dsa-3626
- https://www.exploit-db.com/exploits/40136/
- https://www.exploit-db.com/exploits/40113/
- https://www.openssh.com/txt/release-7.3
- https://security.gentoo.org/glsa/201612-18
- https://access.redhat.com/errata/RHSA-2017:2029
- http://www.securityfocus.com/bid/91812
- https://security.netapp.com/advisory/ntap-20190206-0001/
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
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Timeline
CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.