CVE-2016-6210

5.9MEDIUM

Key Information:

Vendor
OpenBSD
Status
Openssh
Vendor
CVE Published:
13 February 2017

Badges

👾 Exploit Exists🟡 Public PoC

Summary

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.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2016-6210-Exploit
Created by justlce

CVE-2016-6210-OpenSSH-User-Enumeration
Created by samh4cks

References

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
mailing-list

EPSS Score

6% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

.