CVE-2016-6210

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…

Medium · published February 13, 2017

Patch now

High probability of exploitation

CVSS calls it medium at 5.9. It sits in the 99.8th percentile for exploit probability.

CVSS v3.1
5.9
EPSS
89%
Percentile
99.8
In the wild
Unconfirmed
What it is

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 record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.88944 · 99.8th percentile
Published
2017-02-13T00:00Z
EPSS history
Timeline
  • 13 FEB 00:00Z
    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…
    cvelistv5