PT-2020-13134 · Telegram+1 · Telegram Desktop+3

Vijay Tikudave · Published 2020-04-30 · Updated 2021-07-21 · CVE-2020-12474

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Telegram Desktop versions 2.0.1 and earlier Telegram for Android versions 6.0.1 and earlier Telegram for iOS versions 6.0.1 and earlier

Description The issue allows an IDN Homograph attack via Punycode in a public URL or a group chat invitation URL. This could potentially lead to phishing attacks or other malicious activities by tricking users into visiting fake websites that appear legitimate due to the homograph attack.

Recommendations For Telegram Desktop version 2.0.1 and earlier, update to a version later than 2.0.1. For Telegram for Android version 6.0.1 and earlier, update to a version later than 6.0.1. For Telegram for iOS version 6.0.1 and earlier, update to a version later than 6.0.1. As a temporary workaround, consider avoiding clicking on public URLs or group chat invitation URLs from untrusted sources until a patch is available.

Exploit

Fix

Related Identifiers

ALT-PU-2020-1897

ALT-PU-2020-1965

CVE-2020-12474

Affected Products

Alt Linux

Telegram Desktop

Telegram For Android

Telegram For Ios

References · 10

• 🔥 https://github.com/VijayT007/Vulnerability-Database/blob/master/Telegram:CVE-2020-12474 · Exploit
• https://cve.org/CVERecord?id=CVE-2020-12474 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-12474 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-12474 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-12474 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-12474 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-12474 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-12474 · Vendor Advisory
• https://t.me/malwr/3493 · Telegram Post
• https://t.me/cvenotify/3492 · Telegram Post