What is CVE-2021-31318?

CVE-2021-31318 is a vulnerability that affects Telegram Android, Telegram iOS, and Telegram macOS versions lower than 7.1.0.

How severe is CVE-2021-31318?

CVE-2021-31318 has a severity rating of 5.5 (Medium).

How does CVE-2021-31318 affect Telegram?

CVE-2021-31318 allows a remote attacker to access heap memory out-of-bounds on a victim's device via a type confusion vulnerability in Telegram's custom fork of the rlottie library.

Which versions of Telegram are affected by CVE-2021-31318?

Telegram Android versions lower than 7.1.0 (2090), Telegram iOS versions lower than 7.1, and Telegram macOS versions lower than 7.1 are affected by CVE-2021-31318.

Are there any references for CVE-2021-31318?

Yes, you can find references for CVE-2021-31318 at the following links: [Link 1](https://www.shielder.it/advisories/telegram-rlottie-lotcomplayeritem-lotcomplayeritem-type-confusion/), [Link 2](https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/)

Vulnerability/
CVE-2021-31318

medium

5.5

CWE

843

18/5/2021

3/8/2024

CVE-2021-31318

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 Type Confusion in the LOTCompLayerItem::LOTCompLayerItem 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.

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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Frequently Asked Questions

What is CVE-2021-31318?
CVE-2021-31318 is a vulnerability that affects Telegram Android, Telegram iOS, and Telegram macOS versions lower than 7.1.0.
How severe is CVE-2021-31318?
CVE-2021-31318 has a severity rating of 5.5 (Medium).
How does CVE-2021-31318 affect Telegram?
CVE-2021-31318 allows a remote attacker to access heap memory out-of-bounds on a victim's device via a type confusion vulnerability in Telegram's custom fork of the rlottie library.
Which versions of Telegram are affected by CVE-2021-31318?
Telegram Android versions lower than 7.1.0 (2090), Telegram iOS versions lower than 7.1, and Telegram macOS versions lower than 7.1 are affected by CVE-2021-31318.
Are there any references for CVE-2021-31318?
Yes, you can find references for CVE-2021-31318 at the following links: [Link 1](https://www.shielder.it/advisories/telegram-rlottie-lotcomplayeritem-lotcomplayeritem-type-confusion/), [Link 2](https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/)

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