#VU46538 Input validation error in WhatsApp Messenger for Android and WhatsApp Business for Android - CVE-2020-1890

Vulnerability identifier: #VU46538

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-1890

CWE-ID: CWE-20

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 the target system.

The vulnerability exists due to a URL validation issue. A remote attacker can cause the recipient of a sticker message containing deliberately malformed data to load an image from a sender-controlled URL without user interaction.

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

---

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

---

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.