CVE-2021-21317

Katalog CVE

CVSS 5.3 · Medium EPSS 2,5%

Kerentanan Uncontrolled Resource Consumption pada uap-core project uap-core. Skor CVSS 3.1 5.3 (Medium) menurut NVD.

Deskripsi (NVD)

uap-core in an open-source npm package which contains the core of BrowserScope's original user agent string parser. In uap-core before version 0.11.0, some regexes are vulnerable to regular expression denial of service (REDoS) due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to maliciously crafted long strings. This is fixed in version 0.11.0. Downstream packages such as uap-python, uap-ruby etc which depend upon uap-core follow different version schemes.

Rincian

Terbit di NVD

16 Februari 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-400: Uncontrolled Resource Consumption
CWE-1333: Inefficient Regular Expression Complexity

EPSS (30 hari)

2,5% peluang dieksploitasi; lebih tinggi dari 84,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/ua-parser/uap-core/commit/dc9925d458214cfe87b93e35346980612f6ae96c patch
• https://github.com/ua-parser/uap-core/security/advisories/GHSA-p4pj-mg4r-x6v4 advisory pihak ketiga
• https://www.npmjs.com/package/uap-core product · advisory pihak ketiga