This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2021-34813 →

DEBIAN-CVE-2021-34813

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...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 olm

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.3~dfsg-3"}]}]

Debian:13 olm

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.3~dfsg-3"}]}]

Debian:14 olm

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.2.3~dfsg-3"}]}]

References

advisory security-tracker.debian.org