CVE-2006-4253

Severity: high (CVSS 7.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 15.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2006-08-21 · updated 2026-06-16
Weakness: CWE-264

Description

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.

Affected products

K-Meleon Project K-Meleon: 1.0.1
Mozilla Firefox: 0.8, 0.9, 0.9-rc, 0.9.1, 0.9.2, 0.9.3 (+20)
Netscape Navigator: 8.1

References

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