CVE-2016-4294 Memory corruption in Hancom Office
A heap-based buffer overflow in Hancom Office allows remote attackers to execute arbitrary code via a crafted Hcell document.
- 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-2016-4294?
CVE-2016-4294 is a high-severity memory corruption vulnerability in Hancom Office, published on 6 Jan 2017. 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
When opening a Hangul Hcell Document (.cell) and processing a property record within the Workbook stream, Hancom Office 2014 will attempt to allocate space for an element using a length from the file. When copying user-supplied data to this buffer, however, the application will use a different size which leads to a heap-based buffer overflow. This vulnerability can lead to code-execution under the context of the application.
Weakness: CWE-119
Which versions are affected by CVE-2016-4294?
It affects 1 product.
Products include Hancom Hancom Office 2014.
How do I fix CVE-2016-4294?
No fix has been published for CVE-2016-4294 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-2016-4294 being exploited?
There is no known exploitation of CVE-2016-4294 in the wild and no public exploit code.
Other vulnerabilities in Hancom Office
Sources
Also known as GHSA-4hrr-9ph7-2w2p.