What is CVE-2021-31318?

CVE-2021-31318 is a medium-severity vulnerability in Telegram, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 5.5/10. Published 2021-05-18.

How severe is CVE-2021-31318?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Telegram

CVE-2021-31318

Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Type Confusion in the LOTCompLayerItem::LOTCompLayerItem 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.

EPSS: 0.013 (67.2th percentile) — read the EPSS interpretation.

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.

Affected products

Telegram
N/a — versions n/a

Weakness classification (CWE)

CWE-843 — Access of Resource Using Incompatible Type (Type Confusion)

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-31318?: CVE-2021-31318 is a medium-severity vulnerability in Telegram, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 5.5/10. Published 2021-05-18.
How severe is CVE-2021-31318?: Medium severity. CVSS v3 base score is 5.5 out of 10.