Integer overflow in Hancom Office 2014
CVE-2016-4298
When opening a Hangul HShow Document (.hpt) and processing a structure within the document, Hancom Office 2014 will attempt to allocate space for a list of elements using a length from the file. When calculating this length, an integer overflow can be made to occur which will cause the buffer to be undersized when the application tries to copy file data into the object containing this structure. This allows one to overwrite contiguous data in the heap which can lead to code-execution under the context of the application.
Vulnerability class: Integer Overflow
EPSS: 0.023 (81.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Hancom Hancom_office_2014
- N/a Hancom Version Office 2014 Vp Trial Hshow.exe Product Version: 9.1.0.2176 Hncbm90.dll 9.1.0.2291 — versions Hancom version Hancom Office 2014 VP Trial HShow.exe Product version: 9.1.0.2176 HncBM90.dll Product version: 9.1.0.2291
Weakness classification (CWE)
References
- cret@cert.org (Technical Description, Exploit, VDB Entry, Third Party Advisory, x_refsource_MISC)
- cret@cert.org (vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2016-4298?
- CVE-2016-4298 is a high-severity vulnerability in Hancom Office 2014, classified under Integer Overflow or Wraparound. CVSS score: 7.8/10. Published 2017-01-06.
- How severe is CVE-2016-4298?
- High severity. CVSS v3 base score is 7.8 out of 10.