Buffer overflow in Telegram
CVE-2021-31322
Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Heap Buffer Overflow in the LOTGradient::populate function of their custom fork of the rlottie library. A remote attacker might be able to access heap memory out-of-bounds on a victim device via a malicious animated sticker.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.014 (72.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 73rd percentile — 72.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.shielder.it/blog/2021/02/hunting-for-bugs-in-telegrams-animated-stickers-re… (Exploit, Third Party Advisory)
- www.shielder.it/advisories/telegram-rlottie-lotgradient-populate-heap-buffer-ov… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-31322?
- CVE-2021-31322 is a medium-severity vulnerability in Telegram, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2021-05-18.
- How severe is CVE-2021-31322?
- Medium severity. CVSS v3 base score is 5.5 out of 10.