Buffer Underflow in Hancom Office 2020
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-33896 |
| CWE-ID | CWE-124 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Hancom Office Client/Desktop applications / Office applications |
| Vendor | Hancom, Inc. |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Buffer Underwrite ('Buffer Underflow')
EUVDB-ID: #VU67931
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 - Buffer Underwrite ('Buffer Underflow')
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's website.
Vulnerable software versionsHancom Office: 2020 11.0.0.5357
External linkshttp://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.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website or open a file.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
