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

criticalknown exploitedpublic exploitCVE-2016-9079
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
Mozilla Firefox, Firefox ESR, and Thunderbird contain a use-after-free vulnerability in SVG Animation, targeting Firefox and Tor browser users on Windows.

CSIRTS triage

vendor: Mozillaproduct: Firefox, Firefox ESR, ThunderbirdMemory corruption
What
A use-after-free vulnerability in SVG Animation targets Firefox and Tor browser users on Windows.
Who is affected
Users of Mozilla Firefox, Firefox ESR, and Thunderbird.
Urgency
Remediation is urgent as the vulnerability is critical and actively exploited.
Action
Update to the latest versions of Firefox and Thunderbird.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2023-06-22
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2016-9079

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2016-9079coverage & exploitation statusNVD · CVE.org

Recent advisories for Mozilla Firefox

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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