Multiple vulnerabilities in Telegram on MacOS

Published: 2021-02-18

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-27205 CVE-2021-27204
CWE-ID	CWE-200
Exploitation vector	Local
Public exploit	N/A
Vulnerable software	Telegram for macOS Client/Desktop applications / Messaging software
Vendor	Telegram

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU50800

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-27205

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to the affected software stores the local copy of self-destructed messages in a sandbox path. A local user can gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Telegram for macOS: 7.0 - 7.3

CPE2.3

External links

https://www.inputzero.io/2020/12/telegram-privacy-fails-again.html
https://www.youtube.com/watch?v=Go-4srm_1fQ

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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

2) Information disclosure

EUVDB-ID: #VU50801