[release-branch.go1.22] net/http: persist header stripping across repeated redirects When an HTTP redirect changes the host of a request, we drop sensitive headers such as Authorization from the redirected request. Fix a bug where a chain of redirects could result in sensitive headers being sent to the wrong host: 1. request to a.tld with Authorization header 2. a.tld redirects to b.tld 3. request to b.tld with no Authorization header 4. b.tld redirects to b.tld 3. request to b.tld with Authorization header restored Thanks to Kyle Seely for reporting this issue. Fixes #70530 For #71210 Fixes CVE-2024-45336 Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/1641 Reviewed-by: Roland Shoemaker <bracewell@google.com> Reviewed-by: Tatiana Bradley <tatianabradley@google.com> Commit-Queue: Roland Shoemaker <bracewell@google.com> Change-Id: Id7b1e3c90345566b8ee1a51f65dbb179da6eb427 Reviewed-on: https://go-internal-review.googlesource.com/c/go/+/1765 Reviewed-on: https://go-review.googlesource.com/c/go/+/643106 Reviewed-by: Michael Pratt <mpratt@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Auto-Submit: Michael Knyszek <mknyszek@google.com>
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