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Fix open redirect check for more cases (#25143) (#25154)

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Backport #25143 by @lafriks

If redirect_to parameter has set value starting with `\\example.com`
redirect will be created with header `Location: /\\example.com` that
will redirect to example.com domain.

Co-authored-by: Lauris BH <lauris@nix.lv>
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Giteabot 2023-06-08 12:03:42 -04:00 • committed by GitHub
parent 82a8c26bbf
commit 7679f4d51a
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1 changed files with 2 additions and 2 deletions
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4
modules/context/context_response.go
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@ -49,9 +49,9 @@ func (ctx *Context) RedirectToFirst(location ...string) {
continue continue
} }
// Unfortunately browsers consider a redirect Location with preceding "//" and "/\" as meaning redirect to "http(s)://REST_OF_PATH" // Unfortunately browsers consider a redirect Location with preceding "//", "\\" and "/\" as meaning redirect to "http(s)://REST_OF_PATH"
// Therefore we should ignore these redirect locations to prevent open redirects // Therefore we should ignore these redirect locations to prevent open redirects
if len(loc) > 1 && loc[0] == '/' && (loc[1] == '/' || loc[1] == '\\') { if len(loc) > 1 && (loc[0] == '/' || loc[0] == '\\') && (loc[1] == '/' || loc[1] == '\\') {
continue continue
} }