All vulnerabilities
CVE-2019-11707

Mozilla Firefox and Thunderbird Type Confusion Vulnerability

Mozilla Firefox and ThunderbirdApplications & CMS
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationExploited in the wildAdded to KEV 23 May 2022CISA KEV
Exploit odds (EPSS)37.7%Chance of exploitation activity in the next 30 days, higher than 98% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in60.7.1Also 67.0.3, 60.7.2CVE List
Federal deadline13 Jun 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 26 Jun 2019Exploit code publicExploit-DB
  2. 23 Jul 2019, 13:20 UTCPublishedCVE List
  3. 23 May 2022Added to CISA KEVCISA KEV

Public exploit code and templates 2

  • Local exploitMozilla Firefox 67 - Array.pop JIT Type Confusion 2 Feb 2022Exploit-DB
  • Dos exploitMozilla Spidermonkey - IonMonkey 'Array.prototype.pop' Type Confusion 26 Jun 2019Exploit-DB

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

Mozilla Firefox and Thunderbird contain a type confusion vulnerability that can occur when manipulating JavaScript objects due to issues in Array.pop, allowing for an exploitable crash.

Text from CVE List

Affected versions 3

  • Firefox ESRaffected: unspecified before 60.7.1CVE List
  • Firefoxaffected: unspecified before 67.0.3CVE List
  • Thunderbirdaffected: unspecified before 60.7.2CVE List

References 6