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CVE-2024-29944 is a critical Firefox and Firefox ESR vulnerability in which an attacker can inject an event handler into a privileged object, resulting in arbitrary JavaScript execution in the browser parent process. The flaw enables execution within a more privileged context than intended and constitutes a sandbox or security-boundary bypass leading to privilege escalation. It affects Desktop Firefox prior to 124.0.1 and Firefox ESR prior to 115.9.1. Mobile versions of Firefox are not affected.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Firefox zero-day vulnerability identified and exploited during Pwn2Own Vancouver 2024.
A zero-day privilege escalation vulnerability in Firefox and Firefox ESR that allows execution of arbitrary JavaScript code in the parent process.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.