PT-2021-18762 · Telegram · Telegram

Published 2021-04-20 · Updated 2024-08-03 · CVE-2021-30496

Positive Technologies (AI Summary)

CVSS v3.1

5.7

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Telegram app version 7.6.2 for iOS

Description The issue allows remote authenticated users to cause a denial of service, resulting in an application crash, if the victim pastes an attacker-supplied message, such as one in the Persian language, into a channel or group. The crash occurs in MtProtoKitFramework.

Recommendations For Telegram app version 7.6.2 for iOS, consider avoiding pasting potentially malicious messages into channels or groups until a fix is available. As a temporary workaround, users may want to exercise caution when handling messages from unknown sources to minimize the risk of application crash. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2021-30496

Affected Products

Telegram

References · 5

• 🔥 https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31 · Exploit
• https://osv.dev/vulnerability/CVE-2021-30496 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-30496 · Security Note
• https://t.me/joinchat/bJ9cnUosVh03ZTI0 · Vendor Advisory
• https://t.me/cvenotify/88857 · Telegram Post