Main Vulnerability Database Vulnerabilities #VU27540

Spoofing attack in Telegram products - CVE-2020-12474

Published: May 5, 2020

Vulnerability identifier: #VU27540

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-12474

CWE-ID: CWE-451

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to incorrect processing of user-supplied data passed via a public URL or a group chat invitation URL. A remote attacker can perform an IDN Homograph attack via Punycode.

Affected software

Telegram Desktop for Windows
Telegram for iOS
Telegram for Android

How to mitigate CVE-2020-12474

Install updates from vendor's website.

Telegram Desktop for Windows - update to 2.1.0
Telegram for iOS - update to 6.1
Telegram for Android - update to 6.1.0_1938

External References

https://github.com/VijayT007/Vulnerability-Database/blob/master/Telegram:CVE-2020-12474

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