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Roland Shoemaker 337dd75343 [release-branch.go1.20] html/template: emit filterFailsafe for empty unquoted attr value
An unquoted action used as an attribute value can result in unsafe
behavior if it is empty, as HTML normalization will result in unexpected
attributes, and may allow attribute injection. If executing a template
results in a empty unquoted attribute value, emit filterFailsafe
instead.

Thanks to Juho Nurminen of Mattermost for reporting this issue.

For #59722
Fixes #59816
Fixes CVE-2023-29400

Change-Id: Ia38d1b536ae2b4af5323a6c6d861e3c057c2570a
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1826631
Reviewed-by: Julie Qiu <julieqiu@google.com>
Run-TryBot: Roland Shoemaker <bracewell@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/1851494
Run-TryBot: Damien Neil <dneil@google.com>
Reviewed-by: Roland Shoemaker <bracewell@google.com>
TryBot-Result: Security TryBots <security-trybots@go-security-trybots.iam.gserviceaccount.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/491358
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Run-TryBot: Carlos Amedee <carlos@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2023-05-02 16:36:15 +00:00
.github .github: suggest using private browsing in pkgsite template 2023-01-03 18:52:47 +00:00
api api: promote next to go1.20 2022-12-07 16:56:12 +00:00
doc [release-branch.go1.20] time: revert strict parsing of RFC 3339 2023-01-18 20:42:20 +00:00
lib/time lib/time: update to 2022g/2022g 2022-12-07 00:25:27 +00:00
misc [release-branch.go1.20] cmd/compile: re-compile instantiated generic methods in linkshared mode 2023-03-29 18:40:30 +00:00
src [release-branch.go1.20] html/template: emit filterFailsafe for empty unquoted attr value 2023-05-02 16:36:15 +00:00
test [release-branch.go1.20] cmd/compile: use correct type for byteswaps on multi-byte stores 2023-04-24 13:44:00 +00:00
.gitattributes
.gitignore
CONTRIBUTING.md
LICENSE
PATENTS
README.md README: update from CC-BY-3.0 to CC-BY-4.0 2022-11-02 20:14:56 +00:00
SECURITY.md
VERSION [release-branch.go1.20] go1.20.3 2023-04-04 17:30:09 +00:00
codereview.cfg [release-branch.go1.20] update codereview.cfg for release-branch.go1.20 2022-12-07 18:00:33 +00:00

README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

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