Remote code execution in WhatsApp Messenger

1) Integer overflow

EUVDB-ID: #VU22807

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-2019-11927

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow when parsing EXIF tags in WEBP images. A remote attacker can create a specially crafted WEBP image, send it to the victim, trigger integer 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.

Vulnerable software versions

WhatsApp Messenger for Android: 2.19.2 - 2.19.333

WhatsApp Messenger for iOS: 2.19.10 - 2.19.92

External links

http://www.facebook.com/security/advisories/cve-2019-11927

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to perform certain actions on the device.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.