CVE-2021-34813

Published: Jun 16, 2021Modified: Nov 21, 2024

9.8

Vector

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

Exploitability: 3.9 / Impact: 5.9

Source: NVD

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.

Affected (1)

Products: Matrix: Olm

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Matrix Olm	Before 3.2.3

Related CWEs

Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

References (6)

https://gitlab.matrix.org/matrix-org/olm/-/commit/ccc0d122ee1b4d5e5ca4ec1432086be17d5f901b

Source: cve@mitre.org

PatchVendor Advisory

https://gitlab.matrix.org/matrix-org/olm/-/releases/3.2.3

Source: cve@mitre.org

Release NotesVendor Advisory

https://matrix.org/blog/2021/06/14/adventures-in-fuzzing-libolm

Source: cve@mitre.org

ExploitPatchVendor Advisory

https://gitlab.matrix.org/matrix-org/olm/-/commit/ccc0d122ee1b4d5e5ca4ec1432086be17d5f901b

Source: af854a3a-2127-422b-91ae-364da2661108

PatchVendor Advisory

https://gitlab.matrix.org/matrix-org/olm/-/releases/3.2.3

Source: af854a3a-2127-422b-91ae-364da2661108

Release NotesVendor Advisory

https://matrix.org/blog/2021/06/14/adventures-in-fuzzing-libolm

Source: af854a3a-2127-422b-91ae-364da2661108

ExploitPatchVendor Advisory

Timeline

No history available yet.