CVE Vulnerability

CVE-2021-43523

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.

6.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 6.4

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

Scope

9.6 /10

CVSS v3.0 : CRITICAL

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References
Link Resource
https://www.openwall.com/lists/oss-security/2021/11/09/1 Exploit Mailing List
https://uclibc-ng.org/ Vendor Advisory
https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:uclibc:uclibc:*:*:*:*:*:*:*:*
cpe:2.3:a:uclibc-ng_project:uclibc-ng:*:*:*:*:*:*:*:*
Information

Published : 2021-11-10 03:15

Updated : 2021-11-15 02:19

NVD link : CVE-2021-43523

Mitre link : CVE-2021-43523

Products Affected
No products.
CWE
CWE-79