CVE-2021-42717

Katalog CVE

CVSS 7.5 · High EPSS 3,2%

Kerentanan Uncontrolled Recursion pada owasp modsecurity, trustwave modsecurity +4 lainnya. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.

Rincian

Terbit di NVD

7 Desember 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-674: Uncontrolled Recursion

EPSS (30 hari)

3,2% peluang dieksploitasi; lebih tinggi dari 88,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-... exploit · mitigasi · advisory vendor
• https://www.oracle.com/security-alerts/cpuapr2022.html patch · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2022/05/msg00042.html mailing list · advisory pihak ketiga
• https://www.debian.org/security/2021/dsa-5023 advisory pihak ketiga