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.
Exploits (11)
nomisec
WORKING POC
1 stars
by samh4cks · poc
https://github.com/samh4cks/CVE-2016-6210-OpenSSH-User-Enumeration
gitlab
WORKING POC
by kar0nt3 · poc
https://gitlab.com/kar0nt3/ssh-users-enumeration-by-cve-2016-6210
References (12)
Core 12
Core References
Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Vendor Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2017:2563
Third Party Advisory, VDB Entry vdb-entry
http://www.securitytracker.com/id/1036319
Mailing List, Third Party Advisory mailing-list
http://seclists.org/fulldisclosure/2016/Jul/51
Third Party Advisory vendor-advisory
http://www.debian.org/security/2016/dsa-3626
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/40136/
Exploit, Third Party Advisory exploit
https://www.exploit-db.com/exploits/40113/
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/201612-18
Vendor Advisory vendor-advisory
https://access.redhat.com/errata/RHSA-2017:2029
Third Party Advisory, VDB Entry vdb-entry
http://www.securityfocus.com/bid/91812
Release Notes, Vendor Advisory
https://www.openssh.com/txt/release-7.3
Vendor Advisory
https://security.netapp.com/advisory/ntap-20190206-0001/
Scores
CVSS v3
5.9
EPSS
0.9005
EPSS Percentile
99.6%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Details
CWE
CWE-200
Status
published
Products (1)
openbsd/openssh
< 7.2
Published
Feb 13, 2017
Tracked Since
Feb 18, 2026