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Category:   Device (Firewall)  >   Palo Alto PAN-OS Vendors:   Palo Alto Networks
(Palo Alto Networks Issues Fix for Palo Alto PAN-OS) OpenSSH Lets Remote Users Determine Valid Usernames on the Target System
SecurityTracker Alert ID:  1037378
SecurityTracker URL:  http://securitytracker.com/id/1037378
CVE Reference:   CVE-2016-6210   (Links to External Site)
Date:  Dec 2 2016
Impact:   Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   A vulnerability was reported in OpenSSH. A remote user can determine valid usernames on the target system. Palo Alto PAN-OS is affected.

A remote user can send a specially crafted request with a large password (approximately 10,000 characters) to the target ssh daemon to determine valid usernames on the target system. On systems where a valid user's password has been hashed with SHA256/SHA512, the response time will be shorter for a non-existent username than for a valid username.

Eddie Harari reported this vulnerability.

Impact:   A remote user can determine valid usernames on the target system.
Solution:   Palo Alto Networks has issued a fix (6.0.15, 6.1.15, 7.0.11, 7.1.6).

Palo Alto Networks advisory is available at:

https://securityadvisories.paloaltonetworks.com/Home/Detail/69

Vendor URL:  securityadvisories.paloaltonetworks.com/Home/Detail/69 (Links to External Site)
Cause:   State error

Message History:   This archive entry is a follow-up to the message listed below.
Jul 16 2016 OpenSSH Lets Remote Users Determine Valid Usernames on the Target System



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