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CVE-2002-1221: BIND 8 fails to properly dereference cache SIG RR elements with invalid expiry times

  • Updated on 28 Oct 2014
  • 1 minute to read
  • Contributors 

De-referencing null pointer for certain signature expire values.

          CVE: 


                [CVE-2002-1221](http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-1221)        


    







        
                  
          CERT: 


                [VU#581682](http://www.kb.cert.org/vuls/id/581682)        


    







        
                  
          Posting date: 


                12 Nov 2002        


    







        
                  
          Program Impacted: 


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


    







        
                  
          Versions affected: 


                8.3.0 - 8.3.3        


    







        
                  
          Severity: 


                Serious        


    







        
                  
          Exploitable: 


                Remotely        


    






  Description: 



        
                Remote attackers can cause a denial of service 

(crash) via SIG RR elements with invalid expiry times, which are removed from the internal BIND database and later cause a null dereference.

  Workarounds: 



        
                Disable recursion, if possible.


    


    






  Active exploits: 



        
                None known at this time.        


    






  Solution: 



        
                Upgrade to BIND 8.3.4 or later


    


    







        
                **Acknowledgements:** 

ISC would like to thank Internet Security Systems for bringing this to our attention.

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