CVE-2021-20236

Katalog CVE

CVSS 9.8 · Critical EPSS 1,8%

Kerentanan Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') pada zeromq, redhat ceph storage +2 lainnya. Skor CVSS 3.1 9.8 (Critical) menurut NVD.

Deskripsi (NVD)

A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Rincian

Terbit di NVD

28 Mei 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-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
CWE-787: Out-of-bounds Write

EPSS (30 hari)

1,8% peluang dieksploitasi; lebih tinggi dari 78,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/zeromq/libzmq/security/advisories/GHSA-qq65-x72m-9wr8 patch · advisory pihak ketiga
• https://bugzilla.redhat.com/show_bug.cgi?id=1921976 issue tracking · advisory pihak ketiga