Race condition in Facebook Messenger



Published: 2021-01-20
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID N/A
CWE-ID CWE-362
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
Facebook Messenger
Mobile applications / Apps for mobile phones

Vendor

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Race condition

EUVDB-ID: #VU49849

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-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

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

The vulnerability exists due to a race condition within the way the mobile application implements WebRTC features for voice and video communications. 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

Facebook Messenger: before 290.0.0.16.119

External links

http://www.bleepingcomputer.com/news/security/bugs-in-signal-facebook-google-chat-apps-let-attackers-spy-on-users/


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.



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