go: Fix CVE-2023-29400

emit filterFailsafe for empty unquoted attr
value

(From OE-Core rev: 02a0e76e04ddbbbb381202d61cbb084333336f38)

Signed-off-by: Ashish Sharma <asharma@mvista.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

2 files changed, 95 insertions, 0 deletions

diff --git a/meta/recipes-devtools/go/go-1.14.inc b/meta/recipes-devtools/go/go-1.14.inc
index ea7b9ea80f..33b53b1a34 100644
--- a/meta/recipes-devtools/go/go-1.14.inc
+++ b/meta/recipes-devtools/go/go-1.14.inc
@@ -67,6 +67,7 @@ SRC_URI += "\
     file://CVE-2023-29405-2.patch \
     file://CVE-2023-29402.patch \
     file://CVE-2023-29404.patch \
+    file://CVE-2023-29400.patch \
 "
 
 SRC_URI_append_libc-musl = " file://0009-ld-replace-glibc-dynamic-linker-with-musl.patch"
diff --git a/meta/recipes-devtools/go/go-1.14/CVE-2023-29400.patch b/meta/recipes-devtools/go/go-1.14/CVE-2023-29400.patch
new file mode 100644
index 0000000000..092c7aa0ff
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.14/CVE-2023-29400.patch
@@ -0,0 +1,94 @@
+From 0d347544cbca0f42b160424f6bc2458ebcc7b3fc Mon Sep 17 00:00:00 2001
+From: Roland Shoemaker <bracewell@google.com>
+Date: Thu, 13 Apr 2023 14:01:50 -0700
+Subject: [PATCH] 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.
+
+Fixes #59722
+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://go-review.googlesource.com/c/go/+/491617
+Run-TryBot: Carlos Amedee <carlos@golang.org>
+Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
+Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
+TryBot-Result: Gopher Robot <gobot@golang.org>
+
+Upstream-Status: Backport from [https://github.com/golang/go/commit/0d347544cbca0f42b160424f6bc2458ebcc7b3fc]
+CVE: CVE-2023-29400
+Signed-off-by: Ashish Sharma <asharma@mvista.com>
+---
+ src/html/template/escape.go      |  5 ++---
+ src/html/template/escape_test.go | 15 +++++++++++++++
+ src/html/template/html.go        |  3 +++
+ 3 files changed, 20 insertions(+), 3 deletions(-)
+
+diff --git a/src/html/template/escape.go b/src/html/template/escape.go
+index 4ba1d6b31897e..a62ef159f0dcd 100644
+--- a/src/html/template/escape.go
++++ b/src/html/template/escape.go
+@@ -382,9 +382,8 @@ func normalizeEscFn(e string) string {
+ // for all x.
+ var redundantFuncs = map[string]map[string]bool{
+        "_html_template_commentescaper": {
+-               "_html_template_attrescaper":    true,
+-               "_html_template_nospaceescaper": true,
+-               "_html_template_htmlescaper":    true,
++               "_html_template_attrescaper": true,
++               "_html_template_htmlescaper": true,
+        },
+        "_html_template_cssescaper": {
+                "_html_template_attrescaper": true,
+diff --git a/src/html/template/escape_test.go b/src/html/template/escape_test.go
+index 3dd212bac9406..f8b2b448f2dfa 100644
+--- a/src/html/template/escape_test.go
++++ b/src/html/template/escape_test.go
+@@ -678,6 +678,21 @@ func TestEscape(t *testing.T) {
+                        `<img srcset={{",,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,"}}>`,
+                        `<img srcset=,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,>`,
+                },
++               {
++                       "unquoted empty attribute value (plaintext)",
++                       "<p name={{.U}}>",
++                       "<p name=ZgotmplZ>",
++               },
++               {
++                       "unquoted empty attribute value (url)",
++                       "<p href={{.U}}>",
++                       "<p href=ZgotmplZ>",
++               },
++               {
++                       "quoted empty attribute value",
++                       "<p name=\"{{.U}}\">",
++                       "<p name=\"\">",
++               },
+        }
+ 
+        for _, test := range tests {
+diff --git a/src/html/template/html.go b/src/html/template/html.go
+index bcca0b51a0ef9..a181699a5bda8 100644
+--- a/src/html/template/html.go
++++ b/src/html/template/html.go
+@@ -14,6 +14,9 @@ import (
+ // htmlNospaceEscaper escapes for inclusion in unquoted attribute values.
+ func htmlNospaceEscaper(args ...interface{}) string {
+        s, t := stringify(args...)
++       if s == "" {
++               return filterFailsafe
++       }
+        if t == contentTypeHTML {
+                return htmlReplacer(stripTags(s), htmlNospaceNormReplacementTable, false)
+        }
+