CVE-2021-31315

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

CVSS v3.1 NVD

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

CVSS v2.0 NVD

4.3 MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:N

EPSS

1.29% chance of exploitation in the next 30 days, 70th percentile

Published

2021-05-18

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://www.shielder.it/advisories/telegram-rlottie-blit-stack-buffer-overflow/

Security advisories

• https://www.shielder.it/advisories/telegram-rlottie-blit-stack-buffer-overflow
• https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remo…

References

• CVE Record
• NVD entry