CVE-2021-34813

Description

Matrix libolm before 3.2.3 allows a malicious Matrix homeserver to crash a client (while it is attempting to retrieve an Olm encrypted room key backup from the homeserver) because olm_pk_decrypt has a stack-based buffer overflow. Remote code execution might be possible for some nonstandard build configurations.

Weakness classification

• nvd@nist.gov: CWE-787

Primary references

• cve@mitre.org — Patch, Vendor Advisory
• cve@mitre.org — Release Notes, Vendor Advisory
• cve@mitre.org — Exploit, Patch, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Patch, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Vendor Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Exploit, Patch, Vendor Advisory