CVE-2021-21958

A heap-based buffer overflow vulnerability exists in the Hword HwordApp.dll functionality of Hancom Office 2020 11.0.0.2353. A specially-crafted malformed file can lead to memory corruption and potential arbitrary code execution. An attacker can provide a malicious file to trigger this vulnerability.

CVSS v3 7.8 HIGH
CVSS v2.0 6.8 MEDIUM

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:P

Exploitability : 8.6 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1386	Exploit Third Party Advisory
https://blog.talosintelligence.com/2022/02/vuln-spotlight-.html	Exploit Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1386	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:hancom:hancom_office_2020:11.0.0.2353:*:*:*:*:*:*:*

History

21 Nov 2024, 05:49

Type	Values Removed	Values Added
References	~~() https://talosintelligence.com/vulnerability_reports/TALOS-2021-1386 - Exploit, Third Party Advisory~~	() https://talosintelligence.com/vulnerability_reports/TALOS-2021-1386 - Exploit, Third Party Advisory

Information

Published : 2022-02-16 17:15

Updated : 2024-11-21 05:49

NVD link : CVE-2021-21958

Mitre link : CVE-2021-21958

CVE.ORG link : CVE-2021-21958

JSON object : View

Products Affected

hancom

hancom_office_2020

CWE

CWE-122

Heap-based Buffer Overflow

CWE-787

Out-of-bounds Write

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