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MitreCVE-2021-31320

HistoryMay 18, 2021 - 8:15 p.m.

CVE-2021-31320

2021-05-1820:15:07

CWE-787

mitre

web.nvd.nist.gov

cve-2021-31320

android

ios

macos

heap buffer overflow

vgradientcache

rlottie

remote attacker

animated sticker

nvd

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.1

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

6.4

Confidence

High

EPSS

0.001

Percentile

47.4%

JSON

Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Heap Buffer Overflow in the VGradientCache::generateGradientColorTable function of their custom fork of the rlottie library. A remote attacker might be able to overwrite heap memory out-of-bounds on a victim device via a malicious animated sticker.

Affected configurations

Nvd

Node

telegramtelegramRange<7.1.0android

telegramtelegramRange<7.1.0iphone_os

telegramtelegramRange<7.1.0macos

VendorProductVersionCPE
telegramtelegram*cpe:2.3:a:telegram:telegram:*:*:*:*:*:android:*:*
telegramtelegram*cpe:2.3:a:telegram:telegram:*:*:*:*:*:iphone_os:*:*
telegramtelegram*cpe:2.3:a:telegram:telegram:*:*:*:*:*:macos:*:*

Vendor	Product	Version	CPE
telegram	telegram	*	cpe:2.3:a:telegram:telegram::::::android::*
telegram	telegram	*	cpe:2.3:a:telegram:telegram::::::iphone_os::*
telegram	telegram	*	cpe:2.3:a:telegram:telegram::::::macos::*

References

www.shielder.it/advisories/telegram-rlottie-vgradientcache-generategradientcolortable-heap-buffer-overflow/

www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/

CVSS2

5.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

7.1

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

6.4

Confidence

High

EPSS

0.001

Percentile

47.4%

JSON

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