Headline
CVE-2022-2880: net/http/httputil: ReverseProxy should not forward unparseable query parameters · Issue #54663 · golang/go
Requests forwarded by ReverseProxy include the raw query parameters from the inbound request, including unparseable parameters rejected by net/http. This could permit query parameter smuggling when a Go proxy forwards a parameter with an unparseable value. After fix, ReverseProxy sanitizes the query parameters in the forwarded query when the outbound request’s Form field is set after the ReverseProxy. Director function returns, indicating that the proxy has parsed the query parameters. Proxies which do not parse query parameters continue to forward the original query parameters unchanged.
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This was referenced
Sep 23, 2022
gopherbot pushed a commit that referenced this issue
Sep 28, 2022
…gling
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 #55843 For #54663 For CVE-2022-2880
Change-Id: If1621f6b0e73a49d79059dae9e6b256e0ff18ca9 Reviewed-on: https://go-review.googlesource.com/c/go/+/432976 Reviewed-by: Roland Shoemaker [email protected] Reviewed-by: Brad Fitzpatrick [email protected] TryBot-Result: Gopher Robot [email protected] Run-TryBot: Damien Neil [email protected] Reviewed-on: https://go-review.googlesource.com/c/go/+/433735 Reviewed-by: Dmitri Shuralyov [email protected] Reviewed-by: Dmitri Shuralyov [email protected]
gopherbot pushed a commit that referenced this issue
Sep 28, 2022
…gling
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 [email protected] Reviewed-by: Brad Fitzpatrick [email protected] TryBot-Result: Gopher Robot [email protected] Run-TryBot: Damien Neil [email protected] (cherry picked from commit 7c84234) Reviewed-on: https://go-review.googlesource.com/c/go/+/433695 Reviewed-by: Dmitri Shuralyov [email protected] Reviewed-by: Dmitri Shuralyov [email protected]
bradfitz pushed a commit to tailscale/go that referenced this issue
Oct 5, 2022
…gling
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 golang#55843 For golang#54663 For CVE-2022-2880
Change-Id: If1621f6b0e73a49d79059dae9e6b256e0ff18ca9 Reviewed-on: https://go-review.googlesource.com/c/go/+/432976 Reviewed-by: Roland Shoemaker [email protected] Reviewed-by: Brad Fitzpatrick [email protected] TryBot-Result: Gopher Robot [email protected] Run-TryBot: Damien Neil [email protected] Reviewed-on: https://go-review.googlesource.com/c/go/+/433735 Reviewed-by: Dmitri Shuralyov [email protected] Reviewed-by: Dmitri Shuralyov [email protected]
bradfitz pushed a commit to tailscale/go that referenced this issue
Oct 5, 2022
…gling
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 golang#55843 For golang#54663 For CVE-2022-2880
Change-Id: If1621f6b0e73a49d79059dae9e6b256e0ff18ca9 Reviewed-on: https://go-review.googlesource.com/c/go/+/432976 Reviewed-by: Roland Shoemaker [email protected] Reviewed-by: Brad Fitzpatrick [email protected] TryBot-Result: Gopher Robot [email protected] Run-TryBot: Damien Neil [email protected] Reviewed-on: https://go-review.googlesource.com/c/go/+/433735 Reviewed-by: Dmitri Shuralyov [email protected] Reviewed-by: Dmitri Shuralyov [email protected]
bradfitz pushed a commit to tailscale/go that referenced this issue
Oct 5, 2022
…gling
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 golang#55843 For golang#54663 For CVE-2022-2880
Change-Id: If1621f6b0e73a49d79059dae9e6b256e0ff18ca9 Reviewed-on: https://go-review.googlesource.com/c/go/+/432976 Reviewed-by: Roland Shoemaker [email protected] Reviewed-by: Brad Fitzpatrick [email protected] TryBot-Result: Gopher Robot [email protected] Run-TryBot: Damien Neil [email protected] Reviewed-on: https://go-review.googlesource.com/c/go/+/433735 Reviewed-by: Dmitri Shuralyov [email protected] Reviewed-by: Dmitri Shuralyov [email protected]
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