CVE-2021-30496 — MEDIUM (5.7)

Vulnerability Description

The Telegram app 7.6.2 for iOS allows remote authenticated users to cause a denial of service (application crash) if the victim pastes an attacker-supplied message (e.g., in the Persian language) into a channel or group. The crash occurs in MtProtoKitFramework. NOTE: the vendor's perspective is that "this behavior can't be considered a vulnerability."

CVSS Score

5.7

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Telegram	Telegram	7.6.2

Related Weaknesses (CWE)

CWE-121

References

https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31ExploitThird Party Advisory
https://t.me/joinchat/bJ9cnUosVh03ZTI0Vendor Advisory
https://gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31ExploitThird Party Advisory
https://t.me/joinchat/bJ9cnUosVh03ZTI0Vendor Advisory

FAQ

What is CVE-2021-30496?

CVE-2021-30496 is a vulnerability with a CVSS score of 5.7 (MEDIUM). The Telegram app 7.6.2 for iOS allows remote authenticated users to cause a denial of service (application crash) if the victim pastes an attacker-supplied message (e.g., in the Persian language) into...

How severe is CVE-2021-30496?

CVE-2021-30496 has been rated MEDIUM with a CVSS base score of 5.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-30496?

Check the references section above for vendor advisories and patch information. Affected products include: Telegram Telegram.