Critical severity · published Feb 2, 2022
CVE-2021-24043
A missing bound check in RTCP flag parsing code prior to WhatsApp for Android v2.21.23.2, WhatsApp Business for Android v2.21.23.2, WhatsApp for iOS v2.21.230.6, WhatsApp Business…
9.1
CVSS
1.1%
EPSS
No
On KEV
Description
A missing bound check in RTCP flag parsing code prior to WhatsApp for Android v2.21.23.2, WhatsApp Business for Android v2.21.23.2, WhatsApp for iOS v2.21.230.6, WhatsApp Business for iOS 2.21.230.7, and WhatsApp Desktop v2.2145.0 could have allowed an out-of-bounds heap read if a user sent a malformed RTCP packet during an established call.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WH
Whatsapp · Whatsapp
2.21.23.2; 2.21.230.6; 2.2145.0 · source: NVD
WB
Whatsapp Business · Whatsapp
2.21.23.2; 2.21.230.7 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-24043
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-24043
Not Applicable
https://www.whatsapp.com/security/advisories/2021/
Vendor Advisory
https://www.whatsapp.com/security/advisories/2022/
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