Schwachstellen / CVE-2021-43523

kritisch

CVE-2021-43523

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

Veröffentlicht Geändert CWE 79
In der Trivy Database seit spätestens 24. Okt. 2026, 07:11 UTCWann der Eintrag vor diesem Build hinzukam, ist nicht erfasst.

Einstufung nach Quelle

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

Trivys eigenes Label ist CRITICAL. Kritisch laut NVD, CBL-Mariner.

Beschreibung

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.

Betroffene Pakete und behobene Versionen

QuellePaketBehoben in
CBL-Mariner 1.0uclibc-ng0:1.0.37-2.cm1
CBL-Mariner 2.0uclibc-ng0:1.0.37-2.cm2
debian 11uclibckein Fix angegeben
debian 12uclibckein Fix angegeben
debian 13uclibckein Fix angegeben
debian 14uclibckein Fix angegeben
echouclibckein Fix angegeben
rapidfort debian 12uclibckein Fix angegeben
rapidfort debian 13uclibckein Fix angegeben

Referenzen

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.