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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
(Ubuntu Issues Fix) BIND TSIG Authentication Bugs Let Remote Users Bypass Authentication to Transfer or Modify Zone Conetnt
SecurityTracker Alert ID:  1039745
SecurityTracker URL:  http://securitytracker.com/id/1039745
CVE Reference:   CVE-2017-3142, CVE-2017-3143   (Links to External Site)
Date:  Nov 8 2017
Impact:   Disclosure of user information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.4.0 - 9.8.8, 9.9.0 - 9.9.10-P1, 9.10.0 - 9.10.5-P1, 9.11.0 - 9.11.1-P1, 9.9.3-S1 - 9.9.10-S2, 9.10.5-S1 - 9.10.5-S2
Description:   Two vulnerabilities were reported in BIND. A remote user can bypass TSIG authentication to transfer a zone or modify zone contents.

A remote user that can send and receive messages to an authoritative DNS server and with knowledge of a valid TSIG key name can send a specially crafted request packet to bypass TSIG authentication on AXFR requests and transfer the target zone [CVE-2017-3142].

A remote user that can send and receive messages to an authoritative DNS server and with knowledge of a valid TSIG key name can send specially crafted data to bypass TSIG authentication and cause the target server to accept an arbitrary dynamic update to the zone content [CVE-2017-3143].

Systems that rely solely on TSIG keys for access control are affected.

Clement Berthaux from Synacktiv reported these vulnerabilities.

Impact:   A remote user can bypass authentication to transfer a zone or modify zone contents.
Solution:   Ubuntu has issued a fix.

The Ubuntu advisory is available at:

https://www.ubuntu.com/usn/usn-3346-1

Vendor URL:  www.ubuntu.com/usn/usn-3346-3 (Links to External Site)
Cause:   Authentication error
Underlying OS:  Linux (Ubuntu)
Underlying OS Comments:  12.04 ESM

Message History:   This archive entry is a follow-up to the message listed below.
Jun 29 2017 BIND TSIG Authentication Bugs Let Remote Users Bypass Authentication to Transfer or Modify Zone Conetnt



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