CVE-2018-20618 Memory corruption in n/a

High 8.8 Published 31 Dec 2018 Updated 6 May 2025

A heap-based buffer over-read in the ok_mo_decode2 function allows attackers to cause denial of service or disclose sensitive memory information.

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-2018-20618?

CVE-2018-20618 is a high-severity memory corruption vulnerability in n/a, published on 31 Dec 2018. 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

ok-file-formats through 2018-10-16 has a heap-based buffer over-read in the ok_mo_decode2 function in ok_mo.c.

Weakness: CWE-125

Which versions are affected by CVE-2018-20618?

It affects 1 product.

Products include Ok-File-Formats Project Ok-File-Formats.

How do I fix CVE-2018-20618?

No fix has been published for CVE-2018-20618 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-2018-20618 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-20618 exists.

Sources

Also known as GHSA-hc5r-vm96-h4gh.