CVE-2021-21705 : 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, wh

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.

Published 2021-10-04 04:15:08

Updated 2022-10-29 02:50:01

Source PHP Group

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2021-21705

PHP » PHP
Versions from including (>=) 8.0.0 and before (<) 8.0.8
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
Matching versions
PHP » PHP
Versions from including (>=) 7.3.0 and before (<) 7.3.29
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
Matching versions
PHP » PHP
Versions from including (>=) 7.4.0 and before (<) 7.4.21
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
Matching versions
Oracle » Sd-wan Aware » Version: 8.2
cpe:2.3:a:oracle:sd-wan_aware:8.2:*:*:*:*:*:*:*
Matching versions
Netapp » Clustered Data Ontap » Version: N/A
cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2021-21705

Top countries where our scanners detected CVE-2021-21705

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-21705 216,773

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-21705!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-21705

EPSS FAQ

0.09%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 38 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-21705

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: None
4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N	2.8	1.4	PHP Group
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: Low Integrity: None Availability: None

CWE ids for CVE-2021-21705

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Assigned by:
- nvd@nist.gov (Primary)
- security@php.net (Secondary)

References for CVE-2021-21705

https://security.gentoo.org/glsa/202209-20

PHP: Multiple Vulnerabilities (GLSA 202209-20) — Gentoo security
Third Party Advisory

CVEs referencing this url
https://www.oracle.com/security-alerts/cpujan2022.html

Oracle Critical Patch Update Advisory - January 2022
Patch;Vendor Advisory

CVEs referencing this url
https://bugs.php.net/bug.php?id=81122

PHP :: Sec Bug #81122 :: SSRF bypass in FILTER_VALIDATE_URL
Exploit;Issue Tracking;Patch;Vendor Advisory
https://security.netapp.com/advisory/ntap-20211029-0006/

September 2021 PHP Vulnerabilities in NetApp Products | NetApp Product Security
Third Party Advisory

CVEs referencing this url