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/software/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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