CVE-2021-34813

Katalog CVE

CVSS 9.8 · Critical EPSS 4,3%

Kerentanan Out-of-bounds Write pada matrix olm. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

16 Juni 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

9.8 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-787: Out-of-bounds Write

EPSS (30 hari)

4,3% peluang dieksploitasi; lebih tinggi dari 90,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://gitlab.matrix.org/matrix-org/olm/-/commit/ccc0d122ee1b4d5e5ca4ec1432086be17d5f901b patch · advisory vendor
• https://gitlab.matrix.org/matrix-org/olm/-/releases/3.2.3 release notes · advisory vendor
• https://matrix.org/blog/2021/06/14/adventures-in-fuzzing-libolm exploit · patch · advisory vendor