#VU46536 Out-of-bounds write in WhatsApp Messenger for Android and WhatsApp Business for Android - CVE-2020-1886

Vulnerability identifier: #VU46536

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-1886

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WhatsApp Messenger for Android
Mobile applications / Apps for mobile phones
WhatsApp Business for Android
Mobile applications / Apps for mobile phones

Vendor: WhatsApp

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input. A remote attacker can trigger out-of-bounds write via a specially crafted video stream after receiving and answering a malicious video call and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

WhatsApp Messenger for Android: before 2.20.11

WhatsApp Business for Android: before 2.20.2

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External links
https://www.whatsapp.com/security/advisories/2020

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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.