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CVE-1999-0848: fdmax bug
Author: Cathy Almond Reference Number: AA-00943 Views: 1696 Created: 2013-05-29 13:53 Last Updated: 2014-10-28 13:51 0 Rating/ Voters

Denial of service in BIND named via consuming more than "fdmax" file descriptors

CVE: 
CVE-1999-0848
Posting date: 
11 Nov 1999
Program Impacted: 
BIND
Versions affected: 
8.1 - 8.2-p1
Severity: 
Serious
Exploitable: 
Remotely
Description: 

A bug in the handling of file descriptors results in a vulnerability that will crash the DNS server when more than FD_SETSIZE descriptors are consumed.

Workarounds: 

In the "options" section of named.conf, set

{ files #; }

where # is less than FD_SETSIZE (as typically found in /usr/include/sys/select.h)

Active exploits: 
Scripts are available that can implement this attack.
Solution: 

Upgrade to BIND 8.2.1 or later



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