CVE-2021-21394

Katalog CVE

CVSS 6.5 · Medium EPSS 1,5%

Kerentanan Improper Input Validation pada matrix synapse, fedoraproject fedora. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

Synapse is a Matrix reference homeserver written in python (pypi package matrix-synapse). Matrix is an ecosystem for open federated Instant Messaging and VoIP. In Synapse before version 1.28.0 Synapse is missing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. Note that the groups feature is not part of the Matrix specification and the chosen maximum lengths are arbitrary. Not all clients might abide by them. Refer to referenced GitHub security advisory for additional details including workarounds.

Rincian

Terbit di NVD

12 April 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-20: Improper Input Validation

EPSS (30 hari)

1,5% peluang dieksploitasi; lebih tinggi dari 74,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/matrix-org/synapse/pull/9321 patch · advisory pihak ketiga
• https://github.com/matrix-org/synapse/pull/9393 patch · advisory pihak ketiga
• https://github.com/matrix-org/synapse/security/advisories/GHSA-w9fg-xffh-p362 patch · advisory pihak ketiga
• https://pypi.org/project/matrix-synapse/ product · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TNNAJOZNMVMXM...