CVE-2016-4295 Memory corruption in Hancom Office
Heap overflow in Hancom Office allows remote code execution via a malicious 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-2016-4295?
CVE-2016-4295 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 particular record within the Workbook stream, an index miscalculation leading to a heap overlow can be made to occur in Hancom Office 2014. The vulnerability occurs when processing data for a formula used to render a chart via the HncChartPlugin.hplg library. Due to a lack of bounds-checking when incrementing an index that is used for writing into a buffer for formulae, the application can be made to write pointer data outside its bounds which can lead to code execution under the context of the application.
Weakness: CWE-119
Which versions are affected by CVE-2016-4295?
It affects 1 product.
Products include Hancom Hancom Office 2014.
How do I fix CVE-2016-4295?
No fix has been published for CVE-2016-4295 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-2016-4295 being exploited?
There is no known exploitation of CVE-2016-4295 in the wild and no public exploit code.
Other vulnerabilities in Hancom Office
Sources
Also known as GHSA-c9vc-596v-cxc3.