CVE-2016-9079: Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability

CVE-2016-9079 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2023-06-22

A use-after-free vulnerability in SVG Animation allows for remote code execution. The flaw was actively exploited in the wild against Windows users of Firefox and Tor Browser to deanonymize users.

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

Quick answers

Is CVE-2016-9079 exploited in the wild?
Yes. CVE-2016-9079 is known to be exploited in the wild, first recorded on 22 June 2023. Treat it as urgent.
How severe is CVE-2016-9079?
Critical severity, with a CVSS score of 7.5, published 22 June 2023.
Which products and versions are affected?
Mozilla Firefox < 50.0.2; Mozilla Firefox ESR < 45.5.1; Mozilla Thunderbird < 45.5.1; Tor Project Tor Browser.
Is there a fix for CVE-2016-9079?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2016-9079 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2016-9079?
Check whether you run Mozilla Firefox, Mozilla Firefox ESR 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 < 50.0.2
  • Mozilla Firefox ESR < 45.5.1
  • Mozilla Thunderbird < 45.5.1
  • Tor Project Tor Browser

Timeline

  • 2016-11-30: advisory: Mozilla Foundation Security Advisory MFSA2016-92 published
  • 2016-11-30: exploited: Exploit discovered in the wild targeting Tor Browser users
  • 2023-06-22: kev added: Added to CISA Known Exploited Vulnerabilities Catalog

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