CVE-2006-4253
HighSummary
Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via multiple JavaScript timed events that load a deeply nested XML file, followed by redirecting the browser to another page, leading to a concurrency failure that causes structures to be freed incorrectly. Netscape 8.1 and K-Meleon 1.0.1 are also affected, and later Firefox 2.0 RC2 and 1.5.0.7 were reported as affected.
Risk Assessment
The organization is exposed to remote attacks causing browser crashes or arbitrary code execution in the user's context, potentially leading to system compromise. The risk is high because visiting a malicious website is sufficient.
Recommendation
Update Mozilla Firefox to the latest version (beyond 1.5.0.7) and other affected browsers (Netscape, K-Meleon) to versions containing the fix. Restrict access to untrusted websites until updates are applied.
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Original NVD description (English source)
Concurrency vulnerability in Mozilla Firefox 1.5.0.6 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via multiple Javascript timed events that load a deeply nested XML file, followed by redirecting the browser to another page, which leads to a concurrency failure that causes structures to be freed incorrectly, as demonstrated by (1) ffoxdie and (2) ffoxdie3. NOTE: it has been reported that Netscape 8.1 and K-Meleon 1.0.1 are also affected by ffoxdie. Mozilla confirmed to CVE that ffoxdie and ffoxdie3 trigger the same underlying vulnerability. NOTE: it was later reported that Firefox 2.0 RC2 and 1.5.0.7 are also affected.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

