What is the severity of CVE-2021-31321?

The severity of CVE-2021-31321 is high.

What is the vulnerability in Telegram related to CVE-2021-31321?

CVE-2021-31321 is a Stack Based Overflow in the gray_split_cubic function of Telegram's custom fork of the rlottie library.

Are there any references for more information about CVE-2021-31321?

Yes, you can find more information about CVE-2021-31321 at the following links: [Link 1](https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/), [Link 2](https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/).

Vulnerability/
CVE-2021-31321

high

7.1

CWE

787

18/5/2021

3/8/2024

CVE-2021-31321

Q: Which versions of Telegram are affected by CVE-2021-31321?

Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by CVE-2021-31321.

Q: How can a remote attacker exploit CVE-2021-31321?

A remote attacker may be able to overwrite Telegram's stack memory out-of-bounds on a victim device via a specially crafted malicious sticker.

First published: Tue May 18 2021(Updated: )

Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Stack Based Overflow in the gray_split_cubic function of their custom fork of the rlottie library. A remote attacker might be able to overwrite Telegram's stack memory out-of-bounds on a victim device via a malicious animated sticker.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Telegram Telegram	<7.1.0
Telegram Telegram	<7.1.0
Telegram Telegram	<7.1.0

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Reference Links

Frequently Asked Questions

What is the severity of CVE-2021-31321?
The severity of CVE-2021-31321 is high.
Which versions of Telegram are affected by CVE-2021-31321?
Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by CVE-2021-31321.
What is the vulnerability in Telegram related to CVE-2021-31321?
CVE-2021-31321 is a Stack Based Overflow in the gray_split_cubic function of Telegram's custom fork of the rlottie library.
How can a remote attacker exploit CVE-2021-31321?
A remote attacker may be able to overwrite Telegram's stack memory out-of-bounds on a victim device via a specially crafted malicious sticker.
Are there any references for more information about CVE-2021-31321?
Yes, you can find more information about CVE-2021-31321 at the following links: [Link 1](https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/), [Link 2](https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/).

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vendor/telegram
canonical/telegram telegram

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