CVE-2021-3751 Out-of-bounds Write in bfabiszewski/libmobi

Critical 9.6 Published 15 Sep 2021 Updated 3 Aug 2024

An out-of-bounds write vulnerability in libmobi allows attackers to potentially execute arbitrary code or cause a denial of service.

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: None listed

What is CVE-2021-3751?

CVE-2021-3751 is a critical memory corruption vulnerability in bfabiszewski/libmobi, published on 15 Sep 2021. 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

libmobi is vulnerable to Out-of-bounds Write

Weakness: CWE-787

Which versions are affected by CVE-2021-3751?

It affects 1 product.

Products include Libmobi Project Libmobi.

How do I fix CVE-2021-3751?

No fix has been published for CVE-2021-3751 yet. Limit exposure of the affected software until one is available.

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

Is CVE-2021-3751 being exploited?

There is no known exploitation of CVE-2021-3751 in the wild and no public exploit code.

Sources

Also known as GHSA-7g44-2g66-w5fr.