CVE-2021-43523
"uClibc Domain Validation Bypass"
Description
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.
INFO
Published Date :
Nov. 10, 2021, 3:15 p.m.
Last Modified :
Nov. 21, 2024, 6:29 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
6.0
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-43523.
| URL | Resource |
|---|---|
| https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174 | Patch Third Party Advisory |
| https://uclibc-ng.org/ | Vendor Advisory |
| https://www.openwall.com/lists/oss-security/2021/11/09/1 | Exploit Mailing List Third Party Advisory |
| https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174 | Patch Third Party Advisory |
| https://uclibc-ng.org/ | Vendor Advisory |
| https://www.openwall.com/lists/oss-security/2021/11/09/1 | Exploit Mailing List Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-43523 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-43523 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174 Added Reference https://uclibc-ng.org/ Added Reference https://www.openwall.com/lists/oss-security/2021/11/09/1 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Nov. 15, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:P/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H Changed Reference Type https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174 No Types Assigned https://github.com/wbx-github/uclibc-ng/commit/0f822af0445e5348ce7b7bd8ce1204244f31d174 Patch, Third Party Advisory Changed Reference Type https://uclibc-ng.org/ No Types Assigned https://uclibc-ng.org/ Vendor Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2021/11/09/1 No Types Assigned https://www.openwall.com/lists/oss-security/2021/11/09/1 Exploit, Mailing List, Third Party Advisory Added CWE NIST CWE-79 Added CPE Configuration OR *cpe:2.3:a:uclibc:uclibc:*:*:*:*:*:*:*:* versions up to (including) 0.9.33.2 *cpe:2.3:a:uclibc-ng_project:uclibc-ng:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.39
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-43523 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-43523
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.84 }} -0.27%
score
0.81838
percentile