← Back to CVEs

CVE-2021-34813

CRITICAL

9.8

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.

CVE Details

CVSS v3.1 Score9.8

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published6/16/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

matrix:olm

Weaknesses (CWE)

CWE-787

References

https://gitlab.matrix.org/matrix-org/olm/-/commit/ccc0d122ee1b4d5e5ca4ec1432086be17d5f901b(cve@mitre.org)

https://gitlab.matrix.org/matrix-org/olm/-/releases/3.2.3(cve@mitre.org)

https://matrix.org/blog/2021/06/14/adventures-in-fuzzing-libolm(cve@mitre.org)

https://gitlab.matrix.org/matrix-org/olm/-/commit/ccc0d122ee1b4d5e5ca4ec1432086be17d5f901b(af854a3a-2127-422b-91ae-364da2661108)

https://gitlab.matrix.org/matrix-org/olm/-/releases/3.2.3(af854a3a-2127-422b-91ae-364da2661108)

https://matrix.org/blog/2021/06/14/adventures-in-fuzzing-libolm(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.