CVE-2016-4296 Memory corruption in Hancom Office
A heap 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-2016-4296?
CVE-2016-4296 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 record that uses the CSSValFormat object, Hancom Office 2014 will search for an underscore ("_") character at the end of the string and write a null terminator after it. If the character is at the very end of the string, the application will mistakenly write the null-byte outside the bounds of its destination. This can result in heap corruption that can lead code execution under the context of the application
Weakness: CWE-119
Which versions are affected by CVE-2016-4296?
It affects 1 product.
Products include Hancom Hancom Office 2014.
How do I fix CVE-2016-4296?
No fix has been published for CVE-2016-4296 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-2016-4296 being exploited?
There is no known exploitation of CVE-2016-4296 in the wild and no public exploit code.
Other vulnerabilities in Hancom Office
Sources
Also known as GHSA-27v3-wp78-r8ww.