Information disclosure in WhatsApp Messenger for Android

1) Information disclosure

EUVDB-ID: #VU35918

Risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-3566

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

A bug in WhatsApp for Android's messaging logic would potentially allow a malicious individual who has taken over over a WhatsApp user's account to recover previously sent messages. This behavior requires independent knowledge of metadata for previous messages, which are not available publicly. This issue affects WhatsApp for Android 2.19.52 and 2.19.54 - 2.19.103, as well as WhatsApp Business for Android starting in v2.19.22 until v2.19.38.

Mitigation

Install update from vendor's website.

Vulnerable software versions

WhatsApp Messenger for Android: 2.19.52

External links

http://www.facebook.com/security/advisories/cve-2019-3566

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.