CVE-2023-24538

Name
CVE-2023-24538
Description
Templates do not properly consider backticks (`) as Javascript string delimiters, and do not escape them as expected. Backticks are used, since ES6, for JS template literals. If a template contains a Go template action within a Javascript template literal, the contents of the action can be used to terminate the literal, injecting arbitrary Javascript code into the Go template. As ES6 template literals are rather complex, and themselves can do string interpolation, the decision was made to simply disallow Go template actions from being used inside of them (e.g. "var a = {{.}}"), since there is no obviously safe way to allow this behavior. This takes the same approach as github.com/google/safehtml. With fix, Template.Parse returns an Error when it encounters templates like this, with an ErrorCode of value 12. This ErrorCode is currently unexported, but will be exported in the release of Go 1.21. Users who rely on the previous behavior can re-enable it using the GODEBUG flag jstmpllitinterp=1, with the caveat that backticks will now be escaped. This should be used with caution.
NVD Severity
high
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://go.dev/cl/482079
MISC https://pkg.go.dev/vuln/GO-2023-1703
MISC https://groups.google.com/g/golang-announce/c/Xdv6JL9ENs8
MISC https://go.dev/issue/59234
https://security.gentoo.org/glsa/202311-09

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* go >= 1.20.0 < 1.20.3
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* go >= None < 1.19.8

Vulnerable and fixed packages

Source package Branch Version Maintainer Status