#VU67931 Buffer Underwrite ('Buffer Underflow') in Hancom Office


Published: 2022-10-05

Vulnerability identifier: #VU67931

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-33896

CWE-ID: CWE-124

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Hancom Office
Client/Desktop applications / Office applications

Vendor: Hancom, Inc.

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper parsing of XML-based office files. A remote attacker can trick a victim to open a specially crafted file, trigger memory corruption and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Hancom Office: 2020 11.0.0.5357


External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2022-1574


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability