CVE-2021-44449 Memory corruption in JT Utilities

Q: Is CVE-2021-44449 being exploited?

There is no known exploitation of CVE-2021-44449 in the wild and no public exploit code.

Q: How do I fix CVE-2021-44449?

No fix has been published for CVE-2021-44449 yet. Limit exposure of the affected software until one is available.

High 7.8 Published 14 Dec 2021 Updated 4 Aug 2024

An out-of-bounds write in the JTTK library allows attackers to execute arbitrary code via specially crafted JT files.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-44449?

CVE-2021-44449 is a high-severity memory corruption vulnerability in Siemens JT Utilities, published on 14 Dec 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A vulnerability has been identified in JT Utilities (All versions < V12.8.1.1), JTTK (All versions < V10.8.1.1). JTTK library in affected products contains an out of bounds write past the end of an allocated structure while parsing specially crafted JT files. This could allow an attacker to execute code in the context of the current process. (ZDI-CAN-14830)

Weakness: CWE-787

Which versions are affected by CVE-2021-44449?

It affects 2 products.

Products include Siemens Jt Open Toolkit, Siemens Jt Utilities.

How do I fix CVE-2021-44449?

No fix has been published for CVE-2021-44449 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-2021-44449 being exploited?

There is no known exploitation of CVE-2021-44449 in the wild and no public exploit code.

Sources

Also known as GHSA-x3gh-j7gq-pr86.