Vulnerability · Published May 18, 2021 · Assigned by mitre
CVE-2021-31321
High 7.1
In plain English
A high-severity security flaw in the rlottie package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.1% (higher than 66% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.1High
Exploit odds (30 days)1.1%top 34.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rlottie | 0.1+dfsg-2 | DEBIAN-CVE-2021-31321 |
| Debian:13 | rlottie | 0.1+dfsg-2 | DEBIAN-CVE-2021-31321 |
| Debian:14 | rlottie | 0.1+dfsg-2 | DEBIAN-CVE-2021-31321 |
| Ubuntu:22.04:LTS | rlottie | 0.1+dfsg-2ubuntu0.1 | USN-7198-1 |
| Ubuntu:22.04:LTS | rlottie | 0.1+dfsg-2ubuntu0.1 | UBUNTU-CVE-2021-31321 |