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net/http/httputil: ReverseProxy forwards Connection headers if first one is empty [1.15 backport] #46314

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gopherbot opened this issue May 21, 2021 · 3 comments
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net/http/httputil: ReverseProxy forwards Connection headers if first one is empty [1.15 backport] #46314

gopherbot opened this issue May 21, 2021 · 3 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge release-blocker Security
Milestone
Go1.15.13

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@gopherbot
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@FiloSottile requested issue #46313 to be considered for backport to the next 1.15 minor release.

@gopherbot please open backport issues for this, according to the security policy.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label May 21, 2021
@gopherbot gopherbot mentioned this issue May 21, 2021
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@gopherbot gopherbot added this to the Go1.15.13 milestone May 21, 2021
@dmitshur dmitshur mentioned this issue May 21, 2021
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@dmitshur
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Approving as a fix for a security issue. This backport applies to both 1.16 (#46315) and 1.15 (this issue).

@dmitshur dmitshur added CherryPickApproved Used during the release process for point releases Security and removed CherryPickCandidate Used during the release process for point releases labels May 21, 2021
@gopherbot
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Change https://golang.org/cl/323091 mentions this issue: [release-branch.go1.15] net/http/httputil: always remove hop-by-hop headers

@gopherbot
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Closed by merging cbd1ca8 to release-branch.go1.15.

gopherbot pushed a commit that referenced this issue May 28, 2021
@FiloSottile @katiehockman
[release-branch.go1.15] net/http/httputil: always remove hop-by-hop h…
cbd1ca8 
…eaders

Previously, we'd fail to remove the Connection header from a request
like this:

    Connection:
    Connection: x-header

Updates #46313
Fixes #46314
Fixes CVE-2021-33197

Change-Id: Ie3009e926ceecfa86dfa6bcc6fe14ff01086be7d
Reviewed-on: https://go-review.googlesource.com/c/go/+/321929
Run-TryBot: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
Trust: Katie Hockman <katie@golang.org>
Trust: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-on: https://go-review.googlesource.com/c/go/+/323091
Run-TryBot: Katie Hockman <katie@golang.org>
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CherryPickApproved Used during the release process for point releases FrozenDueToAge release-blocker Security
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Go1.15.13
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@FiloSottile @dmitshur @gopherbot