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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
BIND 9 Validator Assumption Error May Let Remote Users Deny Service
SecurityTracker Alert ID:  1012995
SecurityTracker URL:
CVE Reference:   CVE-2005-0034   (Links to External Site)
Date:  Jan 25 2005
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.3.0 only
Description:   A vulnerability was reported in BIND 9. A user may be able to cause denial of service conditions.

NISCC reported that a user may be able to trigger a crash in 'named' due to an incorrect assumption in the validator, causing an internal consistency test to fail. The named process may terminate abnormally.

No further details were provided.

Impact:   A remote user may be able to cause named to crash.
Solution:   The vendor has released a fixed version (9.3.1), available at:

The vendor has described the following workaround:

- Disable dnssec validation (off by default) at the Options/View level

Vendor URL: (Links to External Site)
Cause:   Exception handling error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jun 9 2005 (FreeBSD Issues Fix) BIND 9 Validator Assumption Error May Let Remote Users Deny Service
FreeBSD has released a fix.

 Source Message Contents

[Original Message Not Available for Viewing]

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