Angle brackets should not appear in CSS contexts, as they may affect
token boundaries (such as closing a <style> tag, resulting in
injection). Instead emit filterFailsafe, matching the behavior for other
dangerous characters.
Thanks to Juho Nurminen of Mattermost for reporting this issue.
For #59720
Fixes #59811
Fixes CVE-2023-24539
Signed-off-by: Vivek Kumbhar <vkumb...@mvista.com>
---
meta/recipes-devtools/go/go-1.17.13.inc | 1 +
.../go/go-1.18/CVE-2023-24539.patch | 53 +++++++++++++++++++
2 files changed, 54 insertions(+)
create mode 100644 meta/recipes-devtools/go/go-1.18/CVE-2023-24539.patch
diff --git a/meta/recipes-devtools/go/go-1.17.13.inc
b/meta/recipes-devtools/go/go-1.17.13.inc
index e5e9d841c4..d430e0669d 100644
--- a/meta/recipes-devtools/go/go-1.17.13.inc
+++ b/meta/recipes-devtools/go/go-1.17.13.inc
@@ -31,6 +31,7 @@ SRC_URI += "\
file://CVE-2023-24534.patch \
file://CVE-2023-24538.patch \
file://CVE-2023-24540.patch \
+ file://CVE-2023-24539.patch \
"
SRC_URI[main.sha256sum] =
"a1a48b23afb206f95e7bbaa9b898d965f90826f6f1d1fc0c1d784ada0cd300fd"
diff --git a/meta/recipes-devtools/go/go-1.18/CVE-2023-24539.patch
b/meta/recipes-devtools/go/go-1.18/CVE-2023-24539.patch
new file mode 100644
index 0000000000..fa19e18264
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.18/CVE-2023-24539.patch
@@ -0,0 +1,53 @@
+From e49282327b05192e46086bf25fd3ac691205fe80 Mon Sep 17 00:00:00 2001
+From: Roland Shoemaker <bracew...@google.com>
+Date: Thu, 13 Apr 2023 15:40:44 -0700
+Subject: [PATCH] [release-branch.go1.19] html/template: disallow angle
+ brackets in CSS values
+
+Change-Id: Iccc659c9a18415992b0c05c178792228e3a7bae4
+Reviewed-on:
https://team-review.git.corp.google.com/c/golang/go-private/+/1826636
+Reviewed-by: Julie Qiu <julie...@google.com>
+Run-TryBot: Roland Shoemaker <bracew...@google.com>
+Reviewed-by: Damien Neil <dn...@google.com>
+Reviewed-on:
https://team-review.git.corp.google.com/c/golang/go-private/+/1851496
+Run-TryBot: Damien Neil <dn...@google.com>
+Reviewed-by: Roland Shoemaker <bracew...@google.com>
+Reviewed-on: https://go-review.googlesource.com/c/go/+/491335
+Run-TryBot: Carlos Amedee <car...@golang.org>
+Reviewed-by: Dmitri Shuralyov <dmits...@google.com>
+TryBot-Result: Gopher Robot <go...@golang.org>
+
+Upstream-Status: Backport
[https://github.com/golang/go/commit/e49282327b05192e46086bf25fd3ac691205fe80]
+CVE: CVE-2023-24539
+Signed-off-by: Vivek Kumbhar <vkumb...@mvista.com>
+---
+ src/html/template/css.go | 2 +-
+ src/html/template/css_test.go | 2 ++
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/src/html/template/css.go b/src/html/template/css.go
+index 890a0c6b227fe..f650d8b3e843a 100644
+--- a/src/html/template/css.go
++++ b/src/html/template/css.go
+@@ -238,7 +238,7 @@ func cssValueFilter(args ...any) string {
+ // inside a string that might embed JavaScript source.
+ for i, c := range b {
+ switch c {
+- case 0, '"', '\'', '(', ')', '/', ';', '@', '[', '\\', ']',
'`', '{', '}':
++ case 0, '"', '\'', '(', ')', '/', ';', '@', '[', '\\', ']',
'`', '{', '}', '<', '>':
+ return filterFailsafe
+ case '-':
+ // Disallow <!-- or -->.
+diff --git a/src/html/template/css_test.go b/src/html/template/css_test.go
+index a735638b0314f..2b76256a766e9 100644
+--- a/src/html/template/css_test.go
++++ b/src/html/template/css_test.go
+@@ -231,6 +231,8 @@ func TestCSSValueFilter(t *testing.T) {
+ {`-exp\000052 ession(alert(1337))`, "ZgotmplZ"},
+ {`-expre\0000073sion`, "-expre\x073sion"},
+ {`@import url evil.css`, "ZgotmplZ"},
++ {"<", "ZgotmplZ"},
++ {">", "ZgotmplZ"},
+ }
+ for _, test := range tests {
+ got := cssValueFilter(test.css)
--
2.25.1
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