From: Nicki Křížek <nicki@isc.org>
Date: Thu, 3 Apr 2025 10:57:08 +0000 (+0000)
Subject: [9.18] fix: usr: Stop caching lack of EDNS support
X-Git-Tag: v9.18.36~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=84d0464646b56f746a34c5b4662eca334c7a1fda;p=thirdparty%2Fbind9.git

[9.18] fix: usr: Stop caching lack of EDNS support

`named` could falsely learn that a server doesn't support EDNS when
a spoofed response was received; that subsequently prevented DNSSEC
lookups from being made. This has been fixed.

Backport of MR !776

Closes https://gitlab.isc.org/isc-projects/bind9/-/issues/3949

Closes https://gitlab.isc.org/isc-projects/bind9/-/issues/5066

Merge branch 'backport-5066-stop-caching-lack-of-edns-support-9.18' into 'v9.18.36-release'

See merge request isc-private/bind9!781
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84d0464646b56f746a34c5b4662eca334c7a1fda