VulnerabilityModified
CVE-2021-31317
A remote attacker might be able to access Telegram's heap memory out-of-bounds on a victim device via a malicious animated sticker.
MEDIUM 5.5EPSS 1.29%
Does this matter?
Lower severity and a low EPSS score (1.29%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- EPSS
- 1.29% probability · 69th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-843
- Affected
- telegram/telegram
- Source
- cve@mitre.org
References
- https://www.shielder.it/advisories/telegram-rlottie-vdasher-vdasher-type-confusion/Exploit, Third Party Advisory
- 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-vdasher-vdasher-type-confusion/Exploit, Third Party Advisory
- https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-remote-attack-surface/Exploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.