Published: 18/05/2021 Updated: 25/05/2021

CVSS v2 Base Score: 5.8 | Impact Score: 4.9 | Exploitability Score: 8.6

CVSS v3 Base Score: 7.1 | Impact Score: 5.2 | Exploitability Score: 1.8

VMScore: 516

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

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.

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Debian Bug report logs - #988885 CVE-2021-31323 CVE-2021-31322 CVE-2021-31321 CVE-2021-31320 CVE-2021-31319 CVE-2021-31318 CVE-2021-31317 CVE-2021-31315 Package: src:rlottie; Maintainer for src:rlottie is Nicholas Guriev <guriev-ns@yaru>; Reported by: Moritz Muehlenhoff <jmm@debianorg> Date: Thu, 20 May 2021 19:00:0 ...

CWE-787 https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=988885 https://nvd.nist.gov

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CVE-2021-31321

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