Vulnerability Details : CVE-2021-31321
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.
Vulnerability category: Memory Corruption
Exploit prediction scoring system (EPSS) score for CVE-2021-31321
Probability of exploitation activity in the next 30 days: 0.12%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 46 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-31321
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:P |
8.6
|
4.9
|
[email protected] |
|
7.1
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H |
1.8
|
5.2
|
[email protected] |
CWE ids for CVE-2021-31321
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: [email protected] (Primary)
References for CVE-2021-31321
-
https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/
Exploit;Third Party Advisory
-
https://www.shielder.it/advisories/telegram-rlottie-gray_split_cubic-stack-buffer-overflow/
Exploit;Third Party Advisory
Products affected by CVE-2021-31321
- cpe:2.3:a:telegram:telegram:*:*:*:*:*:macos:*:*
- cpe:2.3:a:telegram:telegram:*:*:*:*:*:iphone_os:*:*
- cpe:2.3:a:telegram:telegram:*:*:*:*:*:android:*:*