High severity · published Jan 6, 2017
CVE-2016-4295
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…
7.8
CVSS
2.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.2% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HO
Hancom Office 2014 · Hancom
through 9.1.0.2176 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-4295
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-4295
www.securityfocus.com
http://www.securityfocus.com/bid/92327
Exploit
http://www.talosintelligence.com/reports/TALOS-2016-0150/
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