@@ -17,6 +17,7 @@ SRC_URI += "\
file://0001-exec.go-do-not-write-linker-flags-into-buildids.patch \
file://0001-src-cmd-dist-buildgo.go-do-not-hardcode-host-compile.patch \
file://CVE-2022-27664.patch \
+ file://0001-net-http-httputil-avoid-query-parameter-smuggling.patch \
"
SRC_URI[main.sha256sum] = "a1a48b23afb206f95e7bbaa9b898d965f90826f6f1d1fc0c1d784ada0cd300fd"
new file mode 100644
@@ -0,0 +1,178 @@
+From c8bdf59453c95528a444a85e1b206c1c09eb20f6 Mon Sep 17 00:00:00 2001
+From: Damien Neil <dneil@google.com>
+Date: Thu, 22 Sep 2022 13:32:00 -0700
+Subject: [PATCH] net/http/httputil: avoid query parameter smuggling
+
+Query parameter smuggling occurs when a proxy's interpretation
+of query parameters differs from that of a downstream server.
+Change ReverseProxy to avoid forwarding ignored query parameters.
+
+Remove unparsable query parameters from the outbound request
+
+ * if req.Form != nil after calling ReverseProxy.Director; and
+ * before calling ReverseProxy.Rewrite.
+
+This change preserves the existing behavior of forwarding the
+raw query untouched if a Director hook does not parse the query
+by calling Request.ParseForm (possibly indirectly).
+
+Fixes #55842
+For #54663
+For CVE-2022-2880
+
+Change-Id: If1621f6b0e73a49d79059dae9e6b256e0ff18ca9
+Reviewed-on: https://go-review.googlesource.com/c/go/+/432976
+Reviewed-by: Roland Shoemaker <roland@golang.org>
+Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
+TryBot-Result: Gopher Robot <gobot@golang.org>
+Run-TryBot: Damien Neil <dneil@google.com>
+(cherry picked from commit 7c84234142149bd24a4096c6cab691d3593f3431)
+Reviewed-on: https://go-review.googlesource.com/c/go/+/433695
+Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
+Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
+
+CVE: CVE-2022-2880
+Upstream-Status: Backport [9d2c73a9fd69e45876509bb3bdb2af99bf77da1e]
+
+Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com>
+---
+ src/net/http/httputil/reverseproxy.go | 36 +++++++++++
+ src/net/http/httputil/reverseproxy_test.go | 74 ++++++++++++++++++++++
+ 2 files changed, 110 insertions(+)
+
+diff --git a/src/net/http/httputil/reverseproxy.go b/src/net/http/httputil/reverseproxy.go
+index 8b63368..c76eec6 100644
+--- a/src/net/http/httputil/reverseproxy.go
++++ b/src/net/http/httputil/reverseproxy.go
+@@ -249,6 +249,9 @@ func (p *ReverseProxy) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
+ }
+
+ p.Director(outreq)
++ if outreq.Form != nil {
++ outreq.URL.RawQuery = cleanQueryParams(outreq.URL.RawQuery)
++ }
+ outreq.Close = false
+
+ reqUpType := upgradeType(outreq.Header)
+@@ -628,3 +631,36 @@ func (c switchProtocolCopier) copyToBackend(errc chan<- error) {
+ _, err := io.Copy(c.backend, c.user)
+ errc <- err
+ }
++
++func cleanQueryParams(s string) string {
++ reencode := func(s string) string {
++ v, _ := url.ParseQuery(s)
++ return v.Encode()
++ }
++ for i := 0; i < len(s); {
++ switch s[i] {
++ case ';':
++ return reencode(s)
++ case '%':
++ if i+2 >= len(s) || !ishex(s[i+1]) || !ishex(s[i+2]) {
++ return reencode(s)
++ }
++ i += 3
++ default:
++ i++
++ }
++ }
++ return s
++}
++
++func ishex(c byte) bool {
++ switch {
++ case '0' <= c && c <= '9':
++ return true
++ case 'a' <= c && c <= 'f':
++ return true
++ case 'A' <= c && c <= 'F':
++ return true
++ }
++ return false
++}
+diff --git a/src/net/http/httputil/reverseproxy_test.go b/src/net/http/httputil/reverseproxy_test.go
+index 4b6ad77..8c0a4f1 100644
+--- a/src/net/http/httputil/reverseproxy_test.go
++++ b/src/net/http/httputil/reverseproxy_test.go
+@@ -1517,3 +1517,77 @@ func TestJoinURLPath(t *testing.T) {
+ }
+ }
+ }
++
++const (
++ testWantsCleanQuery = true
++ testWantsRawQuery = false
++)
++
++func TestReverseProxyQueryParameterSmugglingDirectorDoesNotParseForm(t *testing.T) {
++ testReverseProxyQueryParameterSmuggling(t, testWantsRawQuery, func(u *url.URL) *ReverseProxy {
++ proxyHandler := NewSingleHostReverseProxy(u)
++ oldDirector := proxyHandler.Director
++ proxyHandler.Director = func(r *http.Request) {
++ oldDirector(r)
++ }
++ return proxyHandler
++ })
++}
++
++func TestReverseProxyQueryParameterSmugglingDirectorParsesForm(t *testing.T) {
++ testReverseProxyQueryParameterSmuggling(t, testWantsCleanQuery, func(u *url.URL) *ReverseProxy {
++ proxyHandler := NewSingleHostReverseProxy(u)
++ oldDirector := proxyHandler.Director
++ proxyHandler.Director = func(r *http.Request) {
++ // Parsing the form causes ReverseProxy to remove unparsable
++ // query parameters before forwarding.
++ r.FormValue("a")
++ oldDirector(r)
++ }
++ return proxyHandler
++ })
++}
++
++func testReverseProxyQueryParameterSmuggling(t *testing.T, wantCleanQuery bool, newProxy func(*url.URL) *ReverseProxy) {
++ const content = "response_content"
++ backend := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
++ w.Write([]byte(r.URL.RawQuery))
++ }))
++ defer backend.Close()
++ backendURL, err := url.Parse(backend.URL)
++ if err != nil {
++ t.Fatal(err)
++ }
++ proxyHandler := newProxy(backendURL)
++ frontend := httptest.NewServer(proxyHandler)
++ defer frontend.Close()
++
++ // Don't spam output with logs of queries containing semicolons.
++ backend.Config.ErrorLog = log.New(io.Discard, "", 0)
++ frontend.Config.ErrorLog = log.New(io.Discard, "", 0)
++
++ for _, test := range []struct {
++ rawQuery string
++ cleanQuery string
++ }{{
++ rawQuery: "a=1&a=2;b=3",
++ cleanQuery: "a=1",
++ }, {
++ rawQuery: "a=1&a=%zz&b=3",
++ cleanQuery: "a=1&b=3",
++ }} {
++ res, err := frontend.Client().Get(frontend.URL + "?" + test.rawQuery)
++ if err != nil {
++ t.Fatalf("Get: %v", err)
++ }
++ defer res.Body.Close()
++ body, _ := io.ReadAll(res.Body)
++ wantQuery := test.rawQuery
++ if wantCleanQuery {
++ wantQuery = test.cleanQuery
++ }
++ if got, want := string(body), wantQuery; got != want {
++ t.Errorf("proxy forwarded raw query %q as %q, want %q", test.rawQuery, got, want)
++ }
++ }
++}
+--
+2.32.0
+
Backport patch to fix CVE-2022-2880. Signed-off-by: Sakib Sajal <sakib.sajal@windriver.com> --- meta/recipes-devtools/go/go-1.17.13.inc | 1 + ...util-avoid-query-parameter-smuggling.patch | 178 ++++++++++++++++++ 2 files changed, 179 insertions(+) create mode 100644 meta/recipes-devtools/go/go-1.18/0001-net-http-httputil-avoid-query-parameter-smuggling.patch