CVE-2016-6210
MEDIUM severity · CVSS 5.9 · Information disclosure
5.9CVSS MEDIUM
Summary
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 & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
Confidentiality impactHigh
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)89%
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://seclists.org/fulldisclosure/2016/Jul/51Advisory
- http://www.debian.org/security/2016/dsa-3626
- http://www.securityfocus.com/bid/91812Advisory
- http://www.securitytracker.com/id/1036319
- https://access.redhat.com/errata/RHSA-2017:2029
- https://access.redhat.com/errata/RHSA-2017:2563
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://security.gentoo.org/glsa/201612-18