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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
(IBM Issues Fix for IBM AIX) BIND TSIG Authentication Bugs Let Remote Users Bypass Authentication to Transfer or Modify Zone Conetnt
SecurityTracker Alert ID:  1039230
SecurityTracker URL:  http://securitytracker.com/id/1039230
CVE Reference:   CVE-2017-3142, CVE-2017-3143   (Links to External Site)
Updated:  Sep 13 2017
Original Entry Date:  Aug 26 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:   IBM has issued a fix for IBM AIX.

The IBM advisory is available at:

https://aix.software.ibm.com/aix/efixes/security/bind_advisory16.asc

Vendor URL:  aix.software.ibm.com/aix/efixes/security/bind_advisory16.asc (Links to External Site)
Cause:   Authentication error
Underlying OS:  UNIX (AIX)
Underlying OS Comments:  5.3, 6.1, 7.1, 7.1.4, 7.2.0, 7.2.1

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



 Source Message Contents



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