SecurityTracker.com
Keep Track of the Latest Vulnerabilities
with SecurityTracker!
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 
Sign Up
Sign Up for Your FREE Weekly SecurityTracker E-mail Alert Summary
Instant Alerts
Buy our Premium Vulnerability Notification Service to receive customized, instant alerts
Affiliates
Put SecurityTracker Vulnerability Alerts on Your Web Site -- It's Free!
Partners
Become a Partner and License Our Database or Notification Service
Report a Bug
Report a vulnerability that you have found to SecurityTracker
bugs
@
securitytracker.com






Category:   Application (Database)  >   PostgreSQL Vendors:   postgresql.org
(Ubuntu Issues Fix) PostgreSQL Bugs Let Remote Users Bypass Authentication in Certain Cases and Let Remote Authenticated Users Obtain Passwords and Deny Service
SecurityTracker Alert ID:  1039159
SecurityTracker URL:  http://securitytracker.com/id/1039159
CVE Reference:   CVE-2017-7546, CVE-2017-7547, CVE-2017-7548   (Links to External Site)
Date:  Aug 15 2017
Impact:   Denial of service via network, Disclosure of authentication information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Several vulnerabilities were reported in PostgreSQL. A remote authenticated user can cause denial of service conditions. A remote authenticated user can obtain passwords on the target system. A remote user can gain access to the target system.

Because libpq and libpq-based connection drivers do not send empty password values to the server during an authentication attempt, setting a target user's password to an empty value effectively disables password authentication for the target user's account when using those specific connection drivers. However, other connection drivers that are not based on libpq may forward an empty password, allowing a remote user to supply an empty password to access the target user's account for accounts that have set an empty password value [CVE-2017-7546].

A remote authenticated user can exploit a flaw in the the foreign data wrapper functionality to view passwords in the pg_user_mappings catalog view [CVE-2017-7547].

A remote authenticated user can exploit an access control flaw in the lo_put() function to change the data in a large object and cause denial of service conditions [CVE-2017-7548].

Chapman Flack, Jeff Janes, Ben de Graaff, Jelte Fennema, and Jeroen van der Ham reported these vulnerabilities.

Impact:   A remote authenticated user can cause denial of service conditions.

A remote authenticated user can obtain passwords on the target system.

A remote user can gain access to the target database in certain cases.

Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://www.ubuntu.com/usn/usn-3390-1

Vendor URL:  www.ubuntu.com/usn/usn-3390-1 (Links to External Site)
Cause:   Access control error, Authentication error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  14.04 LTS, 16.04 LTS, 17.04

Message History:   This archive entry is a follow-up to the message listed below.
Aug 11 2017 PostgreSQL Bugs Let Remote Users Bypass Authentication in Certain Cases and Let Remote Authenticated Users Obtain Passwords and Deny Service



 Source Message Contents



[Original Message Not Available for Viewing]


Go to the Top of This SecurityTracker Archive Page





Home   |    View Topics   |    Search   |    Contact Us

Copyright 2017, SecurityGlobal.net LLC