CVE-2019-11707: Mozilla Firefox and Thunderbird Type Confusion Vulnerability

CVE-2019-11707 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2022-05-23

A type confusion vulnerability exists in Mozilla Firefox and Thunderbird when manipulating JavaScript objects via Array.pop. This flaw can result in an exploitable crash and potential arbitrary code execution.

Technologies: Mozilla Firefox, Mozilla Thunderbird. Vendors: Mozilla.

Quick answers

Is CVE-2019-11707 exploited in the wild?
Yes. CVE-2019-11707 is known to be exploited in the wild, first recorded on 23 May 2022. Treat it as urgent.
How severe is CVE-2019-11707?
Critical severity, with a CVSS score of 8.8, published 23 May 2022.
Which products and versions are affected?
Mozilla Firefox ESR < 60.7.1; Mozilla Firefox < 67.0.3; Mozilla Thunderbird < 60.7.2.
Is there a fix for CVE-2019-11707?
A patch was published on 2019-06-18: Mozilla released security advisories MFSA2019-18 and MFSA2019-20 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2019-11707 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2019-11707?
Check whether you run Mozilla Firefox or Mozilla Thunderbird. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Mozilla Firefox ESR < 60.7.1
  • Mozilla Firefox < 67.0.3
  • Mozilla Thunderbird < 60.7.2

Timeline

  • 2019-07-23: disclosed: NVD Published Date
  • 2022-05-23: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2019-06-18: patched: Mozilla released security advisories MFSA2019-18 and MFSA2019-20
  • 2019-06-18: exploited: Reported as being exploited in targeted attacks in the wild at time of disclosure

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