Denial of Service Vulnerability in Telegram for iOS by Telegram
CVE-2021-30496

5.7MEDIUM

Key Information:

Vendor

Telegram

Status
Telegram
Vendor
CVE Published:
20 April 2021

What is CVE-2021-30496?

The Telegram app version 7.6.2 for iOS contains a vulnerability that allows remote authenticated users to trigger a denial of service condition. This can occur when an attacker sends a specifically crafted message, potentially in languages like Persian, which when pasted into a channel or group by the victim, results in a crash of the application. The issue originates from the MtProtoKitFramework, although the vendor asserts that this behavior does not constitute a vulnerability.

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References

https://gist.github.com/raminfp/bf64c2974ee69497873297491...
https://t.me/joinchat/bJ9cnUosVh03ZTI0

CVSS V3.1

Score:
5.7
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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