$ cve CVE-2006-4253 JSON

CVE-2006-4253 EXPLOIT

7.6

HIGH · CVSS 2.0 · EPSS 15.2% (pctl 97)

Patch early

A public exploit exists.

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.

Scoring

CVSS	7.6 (HIGH, v2.0)
Vector	AV:N/AC:H/Au:N/C:C/I:C/A:C
EPSS	15.19% — more likely to be exploited than 97% of all CVEs
Weakness	CWE-264
On CISA KEV	no
Public exploit	yes
Published	2006-08-21
Last modified	2026-06-16

Affected (3)

Vendor	Product
k-meleon project	k-meleon
mozilla	firefox
netscape	navigator

Public exploits

Source	Title	Date
exploit-db	Mozilla Firefox 1.0.x - JavaScript Handler Race Condition Memory Corruption	2006-08-12

References

→ the Explorer · watch your stack · NVD