CVE-1999-0848: fdmax bug

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

          CVE: 


                [CVE-1999-0848](http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0848)        


    







        
                  
          Posting date: 


                11 Nov 1999        


    







        
                  
          Program Impacted: 


                [BIND](https://www.isc.org/software/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      

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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