CVE-2021-43523: uclibc +1 lainnya

csirt@kutim:~/threat-intel/cve/CVE-2021-43523

CVSS 9.6 · Critical EPSS 3,1%

Kerentanan Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') pada uclibc, uclibc-ng project uclibc-ng. Skor CVSS 3.1 9.6 (Critical) menurut NVD.

Deskripsi (NVD)

In uClibc and uClibc-ng before 1.0.39, incorrect handling of special characters in domain names returned by DNS servers via gethostbyname, getaddrinfo, gethostbyaddr, and getnameinfo can lead to output of wrong hostnames (leading to domain hijacking) or injection into applications (leading to remote code execution, XSS, applications crashes, etc.). In other words, a validation step, which is expected in any stub resolver, does not occur.

Rincian

Terbit di NVD: 10 November 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 9.6 (Critical), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS (30 hari): 3,1% peluang dieksploitasi; lebih tinggi dari 87,3% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
uclibc	uclibc	Semua versi hingga 0.9.33.2
uclibc-ng project	uclibc-ng	Semua versi sebelum 1.0.39

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://uclibc-ng.org/ advisory vendor
https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174 patch · advisory pihak ketiga
https://www.openwall.com/lists/oss-security/2021/11/09/1 exploit · mailing list · advisory pihak ketiga

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.