PT-2021-19236 · Telegram+2 · Telegram Android+4

Polict · Published 2021-05-18 · Updated 2025-01-19 · CVE-2021-31315

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Telegram Android versions prior to 7.1.0 (2090) Telegram iOS versions prior to 7.1 Telegram macOS versions prior to 7.1

Description The issue is related to a Stack Based Overflow in the blit function of Telegram's custom fork of the rlottie library. This could allow a remote attacker to access Telegram's stack memory out-of-bounds on a victim device via a malicious animated sticker.

Recommendations For Telegram Android versions prior to 7.1.0 (2090), update to version 7.1.0 (2090) or later. For Telegram iOS versions prior to 7.1, update to version 7.1 or later. For Telegram macOS versions prior to 7.1, update to version 7.1 or later.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-31315

USN-7198-1

Affected Products

Linuxmint

Telegram Android

Telegram Ios

Telegram Macos

Ubuntu

References · 16

• 🔥 https://shielder.it/advisories/telegram-rlottie-blit-stack-buffer-overflow · Exploit
• 🔥 https://shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface · Exploit
• https://ubuntu.com/security/CVE-2021-31318 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7198-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-31315 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31315 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31317 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31320 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31315 · Security Note
• https://cve.org/CVERecord?id=CVE-2021-31315 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-31315 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7198-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31321 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31322 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31319 · Vendor Advisory