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🐛 Do not consider body unreadable when it's http.NoBody (#352)

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* Do not consider body unreadable when it's http.NoBody

Fix #351

* 🐛 appsec: only drop unreadable bodies for methods that carry one

Gate the crowdsecAppsecUnreadableBodyBlock drop on the request method,
mirroring the reference lua-cs-bouncer METHODS_WITH_BODY list
(POST/PUT/PATCH/DELETE). Browser GETs over HTTP/3 never carry a
Content-Length (quic-go always wraps the stream in a non-nil body with
ContentLength -1), so they were all wrongly dropped; they are now
forwarded to appsec headers-only, while gRPC streams (always POST) stay
droppable.

Fix #351

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* 🍱 add test and remove useless comment

* 🍱 add test for GET with unreadable body

* 🍱 fix log

* 🍱 fix test

---------

Co-authored-by: mhx <mathieu@hanotaux.fr>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: maxlerebourg <maxlerebourg@gmail.com>
This commit is contained in:
Daniel Berteaud
2026-07-24 20:49:43 +02:00
committed by GitHub
co-authored by Claude Fable 5 mhx maxlerebourg
parent 1c98c70f14
commit 31874263f2
4 changed files with 75 additions and 15 deletions
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tests/e2e/mock/scenarios/appsec/run.sh
+9
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@@ -30,6 +30,15 @@ body() {
echo "[$SCENARIO] request that send bad body before crowdsecAppsecBodyLimit must pass (AppSec 403)"
assert_status "http://127.0.0.1:${WEB_PORT}/foo" 403 -H "X-Forwarded-For: 1.2.3.4" -X POST -d "a=0&______"
echo "[$SCENARIO] request http2 that send no body GET (AppSec 200)"
assert_status "http://127.0.0.1:${WEB_PORT}/foo" 200 -H "X-Forwarded-For: 1.2.3.4" --http2-prior-knowledge -H "Content-Length:"
echo "[$SCENARIO] request http2 that send unreadable body GET (AppSec 403)"
assert_status "http://127.0.0.1:${WEB_PORT}/foo" 403 -H "X-Forwarded-For: 1.2.3.4" --http2-prior-knowledge -H "Content-Length:" -d "test"
echo "[$SCENARIO] request http2 that send unreadable body POST (AppSec 403)"
assert_status "http://127.0.0.1:${WEB_PORT}/foo" 403 -H "X-Forwarded-For: 1.2.3.4" --http2-prior-knowledge -H "Content-Length:" -X POST -d "test"
}
run_scenario "$SCENARIO" "$HERE" body