CVE-2007-4771 Memory corruption in n/a

Critical 9.3 Published 28 Jan 2008 Updated 7 Aug 2024

Heap-based buffer overflow in ICU library allows attackers to cause denial of service or potentially execute code via crafted regular expressions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2007-4771?

CVE-2007-4771 is a critical memory corruption vulnerability in n/a, published on 28 Jan 2008. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Heap-based buffer overflow in the doInterval function in regexcmp.cpp in libicu in International Components for Unicode (ICU) 3.8.1 and earlier allows context-dependent attackers to cause a denial of service (memory consumption) and possibly have unspecified other impact via a regular expression that writes a large amount of data to the backtracking stack. NOTE: some of these details are obtained from third party information.

Weakness: CWE-399

Which versions are affected by CVE-2007-4771?

It affects 1 product.

Products include Icu-Project International Components for Unicode.

How do I fix CVE-2007-4771?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2007-4771 being exploited?

There is no known exploitation of CVE-2007-4771 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2007-4771, GHSA-78gp-g683-v26p.