Vulnerability Details : CVE-2021-31320
Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Heap Buffer Overflow in the VGradientCache::generateGradientColorTable function of their custom fork of the rlottie library. A remote attacker might be able to overwrite heap memory out-of-bounds on a victim device via a malicious animated sticker.
Vulnerability category: OverflowMemory Corruption
Products affected by CVE-2021-31320
- cpe:2.3:a:telegram:telegram:*:*:*:*:*:macos:*:*
- cpe:2.3:a:telegram:telegram:*:*:*:*:*:iphone_os:*:*
- cpe:2.3:a:telegram:telegram:*:*:*:*:*:android:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-31320
0.16%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 54 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-31320
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.8
|
MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:P |
8.6
|
4.9
|
NIST | |
|
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
|
NIST |
CWE ids for CVE-2021-31320
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-31320
-
https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/
Shielder - Hunting for bugs in Telegram's animated stickers remote attack surfaceExploit;Third Party Advisory
-
https://www.shielder.it/advisories/telegram-rlottie-vgradientcache-generategradientcolortable-heap-buffer-overflow/
Shielder - Telegram rlottie 6.1.1_1946 VGradientCache::generateGradientColorTable Heap Buffer OverflowExploit;Third Party Advisory
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