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.
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2017:2563 | vendor advisory |
| http://www.securitytracker.com/id/1036319 | vdb entry |
| http://seclists.org/fulldisclosure/2016/Jul/51 | third party advisory mailing list |
| http://www.debian.org/security/2016/dsa-3626 | vendor advisory |
| https://www.exploit-db.com/exploits/40136/ | exploit |
| https://www.exploit-db.com/exploits/40113/ | exploit |
| https://www.openssh.com/txt/release-7.3 | release notes vendor advisory |
| https://security.gentoo.org/glsa/201612-18 | vendor advisory |
| https://access.redhat.com/errata/RHSA-2017:2029 | vendor advisory |
| http://www.securityfocus.com/bid/91812 | vdb entry third party advisory |
| https://security.netapp.com/advisory/ntap-20190206-0001/ | |
| https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf |