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MitreCVE-2021-30496

HistoryApr 20, 2021 - 4:15 p.m.

CVE-2021-30496

2021-04-2016:15:10

CWE-121

mitre

web.nvd.nist.gov

cve-2021-30496

ios

denial of service

application crash

mtprotokitframework

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

CVSS3

5.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.2

Confidence

High

EPSS

0.001

Percentile

46.4%

JSON

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.”

Affected configurations

Nvd

Node

telegramtelegramMatch7.6.2iphone_os

VendorProductVersionCPE
telegramtelegram7.6.2cpe:2.3:a:telegram:telegram:7.6.2:*:*:*:*:iphone_os:*:*

Vendor	Product	Version	CPE
telegram	telegram	7.6.2	cpe:2.3:a:telegram:telegram:7.6.2:::::iphone_os::

References

gist.github.com/raminfp/bf64c2974ee6949787329749148a4b31

t.me/joinchat/bJ9cnUosVh03ZTI0

CVSS2

3.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:S/C:N/I:N/A:P

CVSS3

5.7

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

5.2

Confidence

High

EPSS

0.001

Percentile

46.4%

JSON

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