CVE-2016-4296 Information

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

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://www.securityfocus.com/bid/92327 http://www.talosintelligence.com/reports/TALOS-2016-0151/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8