CVE-2021-21705
Apache HTTP Server URL Validation Filter Bug
Description
In PHP versions 7.3.x below 7.3.29, 7.4.x below 7.4.21 and 8.0.x below 8.0.8, when using URL validation functionality via filter_var() function with FILTER_VALIDATE_URL parameter, an URL with invalid password field can be accepted as valid. This can lead to the code incorrectly parsing the URL and potentially leading to other security implications - like contacting a wrong server or making a wrong access decision.
INFO
Published Date :
Oct. 4, 2021, 4:15 a.m.
Last Modified :
Oct. 29, 2022, 2:50 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-21705 has a 1 public PoC/Exploit
available at Github.
Go to the Public Exploits
tab to see the list.
Affected Products
The following products are affected by CVE-2021-21705
vulnerability.
Even if cvefeed.io
is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
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-2021-21705
.
URL | Resource |
---|---|
https://bugs.php.net/bug.php?id=81122 | Exploit Issue Tracking Patch Vendor Advisory |
https://security.gentoo.org/glsa/202209-20 | Third Party Advisory |
https://security.netapp.com/advisory/ntap-20211029-0006/ | Third Party Advisory |
https://www.oracle.com/security-alerts/cpujan2022.html | Patch Vendor 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).
Mode Switcher Framework with Web Server Case Study
security modes resilience mde
Java Xtend GAP
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21705
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21705
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 [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Oct. 29, 2022
Action Type Old Value New Value Changed Reference Type https://security.gentoo.org/glsa/202209-20 No Types Assigned https://security.gentoo.org/glsa/202209-20 Third Party Advisory -
CVE Modified by [email protected]
Sep. 29, 2022
Action Type Old Value New Value Added Reference https://security.gentoo.org/glsa/202209-20 [No Types Assigned] -
Modified Analysis by [email protected]
Feb. 22, 2022
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/security-alerts/cpujan2022.html No Types Assigned https://www.oracle.com/security-alerts/cpujan2022.html Patch, Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:oracle:sd-wan_aware:8.2:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 07, 2022
Action Type Old Value New Value Added Reference https://www.oracle.com/security-alerts/cpujan2022.html [No Types Assigned] -
Modified Analysis by [email protected]
Nov. 05, 2021
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20211029-0006/ No Types Assigned https://security.netapp.com/advisory/ntap-20211029-0006/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 29, 2021
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20211029-0006/ [No Types Assigned] -
Initial Analysis by [email protected]
Oct. 08, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Changed Reference Type https://bugs.php.net/bug.php?id=81122 No Types Assigned https://bugs.php.net/bug.php?id=81122 Exploit, Issue Tracking, Patch, Vendor Advisory Added CWE NIST CWE-20 Added CPE Configuration OR *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions from (including) 7.3.0 up to (excluding) 7.3.29 *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions from (including) 7.4.0 up to (excluding) 7.4.21 *cpe:2.3:a:php:php:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.8
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21705
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-2021-21705
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.09 }} 0.01%
score
0.38360
percentile