SB2021021811 - Multiple vulnerabilities in Telegram on MacOS

Description

This security bulletin contains information about 2 vulnerabilities.

1) Information disclosure (CVE-ID: CVE-2021-27205)

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

CVSSv4: 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

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.

2) Information disclosure (CVE-ID: CVE-2021-27204)

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

CVSSv4: 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

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

The vulnerability exists due to the affected software stores the local passcode in cleartext. A local user can gain unauthorized access to sensitive information on the system.

Remediation

Install update from vendor's website.

References

• https://www.inputzero.io/2020/12/telegram-privacy-fails-again.html
• https://www.youtube.com/watch?v=Go-4srm_1fQ
• https://www.youtube.com/watch?v=zEt-_5b4OaA