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...

Published: 2017-02-13 · Last updated: 2026-05-29

Severity and scoring

CVSS: 5.9 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE: CWE-200

Affected products

Vendor	Product
openbsd	openssh

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2016-6210
[Other]http://seclists.org/fulldisclosure/2016/Jul/51
[Other]http://www.debian.org/security/2016/dsa-3626
[Other]http://www.securityfocus.com/bid/91812
[Other]http://www.securitytracker.com/id/1036319
[Other]https://access.redhat.com/errata/RHSA-2017:2029
[Other]https://access.redhat.com/errata/RHSA-2017:2563
[Other]https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
[Other]https://security.gentoo.org/glsa/201612-18
[Other]https://security.netapp.com/advisory/ntap-20190206-0001/
[Other]https://www.exploit-db.com/exploits/40113/
[Other]https://www.exploit-db.com/exploits/40136/
[Vendor advisory]https://www.openssh.com/txt/release-7.3
[Other]http://seclists.org/fulldisclosure/2016/Jul/51
[Other]http://www.debian.org/security/2016/dsa-3626
[Other]http://www.securityfocus.com/bid/91812
[Other]http://www.securitytracker.com/id/1036319
[Other]https://access.redhat.com/errata/RHSA-2017:2029
[Other]https://access.redhat.com/errata/RHSA-2017:2563
[Other]https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
[Other]https://security.gentoo.org/glsa/201612-18
[Other]https://security.netapp.com/advisory/ntap-20190206-0001/
[Other]https://www.exploit-db.com/exploits/40113/
[Other]https://www.exploit-db.com/exploits/40136/
[Vendor advisory]https://www.openssh.com/txt/release-7.3

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