CVE-1999-0851: naptr bug

Improper validation of zone data for the NAPTR record

          CVE: 


                [CVE-1999-0851](http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0851)        


    







        
                  
          Posting date: 


                11 Nov 1999        


    







        
                  
          Program Impacted: 


                [BIND](https://www.isc.org/bind)        


    







        
                  
          Versions affected: 


                4.9.5, 4.9.5 patchlevel 1, 4.9.6, 4.9.7, 4.9.8, 8.1,

8.1.1, 8.1.2, 8.2, 8.2 patchlevel 1, 8.2.1, 8.2.2, 8.2.2 patchlevel 1

          Severity: 


                Minor        


    







        
                  
          Exploitable: 


                Locally        


    






  Description: 



        
                Improper validation of zone data for the NAPTR 

record being loaded from disk can result in the DNS server crashing.
Zone data read from the network cannot trigger this bug. Given the
privilege level to modify the zone data is typically the same as running
the DNS server, this bug is unlikely to result in an exploit unless
zone files have unusual permissions.

  Workarounds: 



        
                Ensure that permission level required to modify zone files is the same or higher than that of the DNS server. 


    


    






  Active exploits: 



        
                None known at this time.        

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