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MitreCVE-2021-31323

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

CVE-2021-31323

2021-05-1820:15:07

CWE-787

mitre

web.nvd.nist.gov

cve-2021-31323

android

ios

macos

heap buffer overflow

lottieparserimpl

rlottie

remote attacker

animated sticker

nvd

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

Confidence

High

EPSS

0.002

Percentile

52.7%

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 LottieParserImpl::parseDashProperty function of their custom fork of the rlottie library. A remote attacker might be able to access 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-lottieparserimpl-parsedashproperty-heap-buffer-overflow/

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

CVSS2

4.3

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

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

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

Confidence

High

EPSS

0.002

Percentile

52.7%

JSON

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