CVE-2020-36477

Katalog CVE

CVSS 5.9 · Medium EPSS 0,86%

Kerentanan Improper Certificate Validation pada arm mbed tls. Skor CVSS 3.1 5.9 (Medium) menurut NVD.

Deskripsi (NVD)

An issue was discovered in Mbed TLS before 2.24.0. The verification of X.509 certificates when matching the expected common name (the cn argument of mbedtls_x509_crt_verify) with the actual certificate name is mishandled: when the subjecAltName extension is present, the expected name is compared to any name in that extension regardless of its type. This means that an attacker could impersonate a 4-byte or 16-byte domain by getting a certificate for the corresponding IPv4 or IPv6 address (this would require the attacker to control that IP address, though).

Rincian

Terbit di NVD

23 Agustus 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-295: Improper Certificate Validation

EPSS (30 hari)

0,86% peluang dieksploitasi; lebih tinggi dari 57,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/ARMmbed/mbedtls/issues/3498 advisory pihak ketiga
• https://github.com/ARMmbed/mbedtls/releases/tag/v2.24.0 release notes · advisory pihak ketiga
• https://security.gentoo.org/glsa/202301-08 advisory pihak ketiga