Vulnerability identifier: #VU22805

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-11931

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

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

Vendor: WhatsApp

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing elementary stream metadata in MP4 files. A remote attacker can send a specially crafted MP4 file to he victim, trigger stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website. The vulnerability affects Android versions prior to 2.19.274, iOS versions prior to 2.19.100, Enterprise Client versions prior to 2.25.3, Business for Android versions prior to 2.19.104 and Business for iOS versions prior to 2.19.100.

Vulnerable software versions

WhatsApp Messenger for Android: 2.19.2 - 2.19.333

WhatsApp Messenger for iOS: 2.19.10 - 2.19.92

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External links
http://www.facebook.com/security/advisories/cve-2019-11931

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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.