CVEs-PoC/2021/CVE-2021-34813.md

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.

POC

Reference

No PoCs from references.

Github

• https://github.com/ARPSyndicate/cve-scores
• https://github.com/VadimYakovliev/Olm
• https://github.com/ivoryforest/olm
• https://github.com/liamHowatt/olm
• https://github.com/towns-protocol/olm