CVE-2021-24042

Severity CVSS v4.0:

Pending analysis

Type:

CWE-122 Heap-based Buffer Overflow

Publication date:

04/01/2022

Last modified:

22/05/2025

Description

The calling logic for WhatsApp for Android prior to v2.21.23, WhatsApp Business for Android prior to v2.21.23, WhatsApp for iOS prior to v2.21.230, WhatsApp Business for iOS prior to v2.21.230, WhatsApp for KaiOS prior to v2.2143, WhatsApp Desktop prior to v2.2146 could have allowed an out-of-bounds write if a user makes a 1:1 call to a malicious actor.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

9.80

Severity 3.x

CRITICAL

Vector 2.0

AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

7.50

Severity 2.0

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:whatsapp:whatsapp::::::android:-:		2.21.23 (excluding)
cpe:2.3:a:whatsapp:whatsapp:::::business:android::		2.21.23 (excluding)
cpe:2.3:a:whatsapp:whatsapp::::::iphone_os:-:		2.21.230 (excluding)
cpe:2.3:a:whatsapp:whatsapp:::::business:iphone_os:-:*		2.21.230 (excluding)
cpe:2.3:a:whatsapp:whatsapp::::::kaios::*		2.2143 (excluding)
cpe:2.3:a:whatsapp:whatsapp:::::desktop:-::		2.2146 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-24042

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools