CVE-2016-6210

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.

References

https://www.openssh.com/txt/release-7.3

http://seclists.org/fulldisclosure/2016/Jul/51

http://www.securityfocus.com/bid/91812

https://security.gentoo.org/glsa/201612-18

http://www.securitytracker.com/id/1036319

https://www.exploit-db.com/exploits/40136/

https://www.exploit-db.com/exploits/40113/

http://www.debian.org/security/2016/dsa-3626

https://access.redhat.com/errata/RHSA-2017:2563

https://access.redhat.com/errata/RHSA-2017:2029

https://security.netapp.com/advisory/ntap-20190206-0001/

https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf

Details

Risk Information

CVSS v2

CVSS v3