Vulnerabilidades / CVE-2021-43523

crítica

CVE-2021-43523

In uClibc and uClibc-ng before 1.0.39, incorrect handling of special c ...

Publicada Modificada CWE 79
En la Trivy database desde, como mínimo, el 24 oct 2026, 07:11 UTCNo consta cuándo entró antes de ese build.

Severidad por fuente

NVD9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

La etiqueta propia de Trivy es CRITICAL. Crítica según NVD, CBL-Mariner.

Descripción

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.

Paquetes afectados y versiones corregidas

FuentePaqueteCorregido en
CBL-Mariner 1.0uclibc-ng0:1.0.37-2.cm1
CBL-Mariner 2.0uclibc-ng0:1.0.37-2.cm2
debian 11uclibcsin corrección indicada
debian 12uclibcsin corrección indicada
debian 13uclibcsin corrección indicada
debian 14uclibcsin corrección indicada
echouclibcsin corrección indicada
rapidfort debian 12uclibcsin corrección indicada
rapidfort debian 13uclibcsin corrección indicada

Referencias

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.