From e5017a93fcde94f09836200bca55324af037ee5f Mon Sep 17 00:00:00 2001 From: Damien Neil Date: Wed, 1 Jun 2022 11:17:07 -0700 Subject: [PATCH] net/http: don't strip whitespace from Transfer-Encoding headers Do not accept "Transfer-Encoding: \rchunked" as a valid TE header setting chunked encoding. Thanks to Zeyu Zhang (https://www.zeyu2001.com/) for identifying the issue. Fixes #53188 Fixes CVE-2022-1705 Change-Id: I1a16631425159267f2eca68056b057192a7edf6c Reviewed-on: https://go-review.googlesource.com/c/go/+/409874 Reviewed-by: Roland Shoemaker Reviewed-by: Brad Fitzpatrick --- src/net/http/serve_test.go | 1 + src/net/http/transfer.go | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/src/net/http/serve_test.go b/src/net/http/serve_test.go index 464e0f734d..cb6312d641 100644 --- a/src/net/http/serve_test.go +++ b/src/net/http/serve_test.go @@ -6245,6 +6245,7 @@ func TestUnsupportedTransferEncodingsReturn501(t *testing.T) { "fugazi", "foo-bar", "unknown", + "\rchunked", } for _, badTE := range unsupportedTEs { diff --git a/src/net/http/transfer.go b/src/net/http/transfer.go index 6957b246f3..4583c6b453 100644 --- a/src/net/http/transfer.go +++ b/src/net/http/transfer.go @@ -642,7 +642,7 @@ func (t *transferReader) parseTransferEncoding() error { if len(raw) != 1 { return &unsupportedTEError{fmt.Sprintf("too many transfer encodings: %q", raw)} } - if !ascii.EqualFold(textproto.TrimString(raw[0]), "chunked") { + if !ascii.EqualFold(raw[0], "chunked") { return &unsupportedTEError{fmt.Sprintf("unsupported transfer encoding: %q", raw[0])} } -- 2.48.1