CVE-2006-4253 Use after free in n/a
Remote attackers can cause a crash or execute arbitrary code in Mozilla Firefox via a race condition involving JavaScript timed events and XML loading.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2006-4253?
CVE-2006-4253 is a high-severity use after free vulnerability in Mozilla Firefox, published on 21 Aug 2006. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-264
Which versions are affected by CVE-2006-4253?
It affects 3 products.
Products include K-Meleon Project K-Meleon, Mozilla Firefox, Netscape Navigator.
How do I fix CVE-2006-4253?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2006-4253 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-4253 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as CVE-2006-4261, DEBIAN-CVE-2006-4253, GHSA-42hr-qcx2-4fr6.