Spoofing attack in Telegram

1) Spoofing attack

EUVDB-ID: #VU27540

Risk: Medium

CVSSv4.0: 2.7 [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/E:U/U:Green]

CVE-ID: CVE-2020-12474

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Telegram Desktop for Windows: 1.0.0 - 2.0.1

Telegram for Android: 5.8.0 - 6.0.1_1911

Telegram for iOS: 5.1 - 6.0.1

CPE2.3

• cpe:2.3:a:telegram:telegram_desktop_for_windows:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_desktop_for_windows:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_desktop_for_windows:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_for_android:5.8.0:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_for_android:5.9.0:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_for_android:5.10.0:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_for_ios:5.1:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_for_ios:5.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:telegram:telegram_for_ios:5.2:*:*:*:*:*:*:*

External links

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

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.