NULL Pointer Dereference Affecting gopkg.in/yaml.v3 package, versions >=3.0.0 <3.0.1


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept

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  • Snyk IDSNYK-GOLANG-GOPKGINYAMLV3-2952714
  • published17 Jul 2022
  • disclosed27 May 2022
  • creditBradley Kemp

Introduced: 27 May 2022

CVE NOT AVAILABLE CWE-476  (opens 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)
}

CVSS Base Scores

version 3.1