NULL Pointer Dereference Affecting github.com/go-yaml/yaml package, versions >2.4.0 <3.0.1
Snyk CVSS
Attack Complexity
Low
Availability
High
Threat Intelligence
Exploit Maturity
Proof of concept
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Test your applications- Snyk ID SNYK-GOLANG-GITHUBCOMGOYAMLYAML-2952712
- published 17 Jul 2022
- disclosed 27 May 2022
- credit Bradley Kemp
How to fix?
Upgrade github.com/go-yaml/yaml
to version 3.0.1 or higher.
Overview
github.com/go-yaml/yaml is a YAML support package for the Go language.
Affected versions of this package are vulnerable to NULL Pointer Dereference when parsing #\n-\n-\n0
via the parserc.go
parser.
PoC
package main
import (
"gopkg.in/yaml.v3"
)
func main() {
var t interface{}
yaml.Unmarshal([]byte("#\n-\n-\n0"), &t)
}