CVE-2016-4290 Integer overflow in Hancom Office
An integer overflow in Hancom Office allows attackers to execute arbitrary code via a malicious HShow 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-2016-4290?
CVE-2016-4290 is a high-severity 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 HShow Document (.hpt) and processing a structure within the document, Hancom Office 2014 will attempt to allocate space for a block of data within the file. When calculating this length, the application will use a value from the file and add a constant to it without checking whether the addition of the constant will cause the integer to overflow which will cause the buffer to be undersized when the application tries to copy file data into it. This allows one to overwrite contiguous data in the heap which can lead to code-execution under the context of the application.
Weakness: CWE-190
Which versions are affected by CVE-2016-4290?
It affects 1 product.
Products include Hancom Hancom Office 2014.
How do I fix CVE-2016-4290?
No fix has been published for CVE-2016-4290 yet. Limit exposure of the affected software until one is available.
Is CVE-2016-4290 being exploited?
There is no known exploitation of CVE-2016-4290 in the wild and no public exploit code.
Other vulnerabilities in Hancom Office
Sources
Also known as GHSA-vq8v-g3rp-6fc2.