The default configuration of ISC BIND before 9.4.1-P1, when configured as a caching name server, allows recursive queries and provides additional delegation information to arbitrary IP addresses, which allows remote attackers to cause a denial of service (traffic amplification) via DNS queries with spoofed source IP addresses.
Fix
Public exploits 2
- DNS Amplification Scanner (auxiliary module) Metasploit
- pcastagnaro/dns_amplification_scanner PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 2
- http://www.us-cert.gov/reading_room/DNS-recursion121605.pdf Patch, Vendor Advisory
- http://www.us-cert.gov/reading_room/DNS-recursion121605.pdf Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.0 · iscNVD modified 2026-10-09 20:17
Affected (CPE criteria) 1
cpe:2.3:a:isc:bind:9.3.2:*:*:*:*:*:*:*
References 8
- http://dns.measurement-factory.com/surveys/sum1.html
- http://kb.isc.org/article/AA-00269
- http://www.securityfocus.com/archive/1/426368/100/0/threaded
- http://www.us-cert.gov/reading_room/DNS-recursion121605.pdf Patch, Vendor Advisory
- http://dns.measurement-factory.com/surveys/sum1.html
- http://kb.isc.org/article/AA-00269
- http://www.securityfocus.com/archive/1/426368/100/0/threaded
- http://www.us-cert.gov/reading_room/DNS-recursion121605.pdf Patch, Vendor Advisory