Information disclosure in Mocha chat app

1) Information disclosure

EUVDB-ID: #VU49851

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to deisgn errors during implementation of the app. A remote attacker can send specially crafted SDP messages to the affected device while the victim is trying to make a voice or video call and intercept video and audio fragments from the victim's phone before the call is accepted by the callee.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mocha: before 4.0.23

External links

http://www.bleepingcomputer.com/news/security/bugs-in-signal-facebook-google-chat-apps-let-attackers-spy-on-users/
http://bugs.chromium.org/p/project-zero/issues/detail?id=2064&q=mocha&can=1

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.