Vulnerability Details : CVE-2021-31317
Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Type Confusion in the VDasher constructor of their custom fork of the rlottie library. A remote attacker might be able to access Telegram's heap memory out-of-bounds on a victim device via a malicious animated sticker.
Products affected by CVE-2021-31317
- 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-2021-31317
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-2021-31317
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:N/A:N |
8.6
|
2.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2021-31317
-
The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-31317
-
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-vdasher-vdasher-type-confusion/
Shielder - Telegram rlottie 7.0.1_2065 VDasher::VDasher Type ConfusionExploit;Third Party Advisory
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