CVE-2018-1636 Memory corruption in Informix Dynamic Server Enterprise Edition

High 8.2 Published 20 Aug 2019 Updated 16 Sep 2024

An authenticated user can exploit a stack-based buffer overflow in IBM Informix to execute code with root privileges, leading to full system compromise.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-1636?

CVE-2018-1636 is a high-severity memory corruption vulnerability in Ibm Informix Dynamic Server, published on 20 Aug 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Stack-based buffer overflow in oninit in IBM Informix Dynamic Server Enterprise Edition 12.1 allows an authenticated user to execute predefined code with root privileges, such as escalating to a root shell. IBM X-Force ID: 144441.

Weakness: CWE-787

Which versions are affected by CVE-2018-1636?

It affects 1 product.

Products include Ibm Informix Dynamic Server.

How do I fix CVE-2018-1636?

No fix has been published for CVE-2018-1636 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-2018-1636 being exploited?

There is no known exploitation of CVE-2018-1636 in the wild and no public exploit code.

All Ibm Informix Dynamic Server vulnerabilities

Sources

Also known as GHSA-7j5j-7jpv-gf26.