mirror of
https://github.com/isc-projects/bind9.git
synced 2026-05-28 04:34:54 -04:00
The prescan and main update loops in DNS UPDATE processing both used the
same counter to index the maxbytype[] quota array. The prescan loop
always incremented the counter, but the main loop had 14 continue paths
that skipped the increment. This allowed an authenticated DDNS client to
craft an UPDATE message with padding records (e.g. CNAME+A pairs that
trigger CNAME-conflict skips) to shift the counter and read wrong quota
entries, bypassing per-type record limits entirely.
Fix by incrementing the counter unconditionally at the start of each
iteration in the main loop.
(cherry picked from commit
|
||
|---|---|---|
| .. | ||
| check | ||
| confgen | ||
| delv | ||
| dig | ||
| dnssec | ||
| named | ||
| nsupdate | ||
| plugins | ||
| rndc | ||
| tests | ||
| tools | ||
| Makefile.am | ||