Improper Input Validation Affecting php7.4 package, versions <7.4.21-1+deb11u1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.09% (42nd percentile)

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  • Snyk IDSNYK-DEBIAN11-PHP74-1315812
  • published2 Jul 2021
  • disclosed4 Oct 2021

Introduced: 2 Jul 2021

CVE-2021-21705  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Debian:11 php7.4 to version 7.4.21-1+deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream php7.4 package and not the php7.4 package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

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.

CVSS Scores

version 3.1