CVE-2021-28363

Katalog CVE

CVSS 6.5 · Medium EPSS 2,1%

Kerentanan Improper Certificate Validation pada python urllib3, fedoraproject fedora +1 lainnya. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

The urllib3 library 1.26.x before 1.26.4 for Python omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default urllib3 SSLContext will be silently accepted.

Rincian

Terbit di NVD

15 Maret 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:N/UI:N/S:U/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-295: Improper Certificate Validation

EPSS (30 hari)

2,1% peluang dieksploitasi; lebih tinggi dari 81,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/urllib3/urllib3/commit/8d65ea1ecf6e2cdc27d42124e587c1b83a3118b0 patch · advisory pihak ketiga
• https://github.com/urllib3/urllib3/commits/main patch · advisory pihak ketiga
• https://www.oracle.com/security-alerts/cpuoct2021.html patch · advisory pihak ketiga
• https://github.com/urllib3/urllib3/security/advisories/GHSA-5phf-pp7p-vc2r mitigasi · advisory pihak ketiga
• https://pypi.org/project/urllib3/1.26.4/ advisory pihak ketiga
• https://security.gentoo.org/glsa/202107-36 advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4S65ZQVZ2ODGB...
• https://security.gentoo.org/glsa/202305-02
• https://security.netapp.com/advisory/ntap-20240621-0007/