CVE-2021-20038

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi Dipakai ransomware EPSS 99,9%

Kerentanan Stack-based Buffer Overflow pada sonicwall sma 200 firmware, sonicwall sma 210 firmware +3 lainnya. Skor CVSS 3.1 9.8 (Critical) menurut NVD. Masuk katalog KEV CISA pada 28 Januari 2022, artinya sudah terbukti dieksploitasi. Tercatat dipakai dalam kampanye ransomware.

Deskripsi (NVD)

A Stack-based buffer overflow vulnerability in SMA100 Apache httpd server's mod_cgi module environment variables allows a remote unauthenticated attacker to potentially execute code as a 'nobody' user in the appliance. This vulnerability affected SMA 200, 210, 400, 410 and 500v appliances firmware 10.2.0.8-37sv, 10.2.1.1-19sv, 10.2.1.2-24sv and earlier versions.

Rincian

Terbit di NVD

8 Desember 2021

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

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-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

EPSS (30 hari)

99,9% peluang dieksploitasi; lebih tinggi dari 99,9% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

SonicWall SMA 100 Appliances Stack-Based Buffer Overflow Vulnerability

Masuk KEV

28 Januari 2022

Tenggat CISA

11 Februari 2022 (untuk instansi federal AS)

Ransomware

Tercatat dipakai dalam kampanye ransomware

Tindakan wajib

Apply updates per vendor instructions.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0026 advisory vendor
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20038 pemerintah AS
• https://github.com/jbaines-r7/badblood exploit · advisory pihak ketiga
• https://www.rapid7.com/blog/post/2022/01/11/cve-2021-20038-42-sonicwall-sma-100-multiple-vulnerabilities-fixed... exploit · advisory pihak ketiga