CVE-2022-33896 Memory corruption in Hancom Office 2020
A buffer underflow in Hancom Office allows attackers to execute arbitrary code via a malicious XML file.
- 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-2022-33896?
CVE-2022-33896 is a high-severity memory corruption vulnerability in Hancom Office 2020, published on 7 Oct 2022. 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 buffer underflow vulnerability exists in the way Hword of Hancom Office 2020 version 11.0.0.5357 parses XML-based office files. A specially-crafted malformed file can cause memory corruption by using memory before buffer start, which can lead to code execution. A victim would need to access a malicious file to trigger this vulnerability.
Weakness: CWE-124
Which versions are affected by CVE-2022-33896?
It affects 1 product.
Products include Hancom Hancom Office 2020.
How do I fix CVE-2022-33896?
No fix has been published for CVE-2022-33896 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-2022-33896 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2022-33896 exists.
Other vulnerabilities in Hancom Office 2020
Sources
Also known as GHSA-9w8p-gv6j-vj3w.