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OpenAdvisories
Medium · 4.3 CVE-2021-21705 EUVD-2021-8877GHSA-rxcr-7xjm-f9c9

Incorrect URL validation in FILTER_VALIDATE_URL

Published Oct 4, 2021 · Updated Sep 17, 2024 · Assigned by php

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.

Affected products

VendorProductAffectedFixed
PHP Group PHP 7.3.x – < 7.3.29, 7.4.x – < 7.4.21, 8.0.X – < 8.0.8 7.3.29

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 11 php7.4 7.4.21-1+deb11u1 —
Debian 10 php7.3 7.3.29-1~deb10u1 DSA-4935-1
Debian 9 php7.0 7.0.33-0+deb9u11 DLA-2708-1
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS php7.4 7.4.3-4ubuntu2.5 USN-5006-1
Ubuntu 18.04 LTS php7.2 7.2.24-0ubuntu0.18.04.8 USN-5006-1
Show 2 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 16.04 LTS php7.0 7.0.33-0ubuntu0.16.04.16+esm1 USN-5006-2
Ubuntu Pro 14.04 LTS php5 5.5.9+dfsg-1ubuntu4.29+esm14 USN-5006-2
ReleasePackageFixed inAdvisory
RHEL 8 apcu-panel +2 5.1.18-1.module+el8.3.0+6678+b09f589e RHSA-2022:1935
RHEL 8 libzip +2 1.6.1-1.module+el8.3.0+6678+b09f589e RHSA-2022:1935
RHEL 8 php +25 7.4.19-2.module+el8.6.0+13953+0a59ce9f RHSA-2022:1935
RHEL 8 php-pear 1:1.10.12-1.module+el8.3.0+6678+b09f589e RHSA-2022:1935
RHEL 8 php-pecl-rrd 2.0.1-1.module+el8.3.0+6678+b09f589e RHSA-2022:1935
RHEL 8 php-pecl-xdebug 2.9.5-1.module+el8.3.0+6678+b09f589e RHSA-2022:1935
RHEL 8 php-pecl-zip 1.18.2-1.module+el8.3.0+6678+b09f589e RHSA-2022:1935
RHEL 3 rh-php73-php +27 7.3.29-1.el7 RHSA-2021:2992

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 8 apcu-panel +2 5.1.18-1.module_el8.6.0+2750+78feabcb ALSA-2022:1935
AlmaLinux 8 libzip +2 1.6.1-1.module_el8.6.0+2750+78feabcb ALSA-2022:1935
AlmaLinux 8 php +25 7.4.19-2.module_el8.6.0+2750+78feabcb ALSA-2022:1935
AlmaLinux 8 php-pear 1:1.10.12-1.module_el8.6.0+2750+78feabcb ALSA-2022:1935
AlmaLinux 8 php-pecl-rrd 2.0.1-1.module_el8.6.0+2750+78feabcb ALSA-2022:1935
AlmaLinux 8 php-pecl-xdebug 2.9.5-1.module_el8.6.0+2750+78feabcb ALSA-2022:1935
AlmaLinux 8 php-pecl-zip 1.18.2-1.module_el8.6.0+2750+78feabcb ALSA-2022:1935

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 8 libzip 1.6.1-1.module+el8.4.0+415+e936cba3 RLSA-2022:1935
Rocky Linux 8 php 7.4.19-2.module+el8.6.0+789+2130c178 RLSA-2022:1935
Rocky Linux 8 php-pear 1:1.10.12-1.module+el8.4.0+415+e936cba3 RLSA-2022:1935
Rocky Linux 8 php-pecl-apcu 5.1.18-1.module+el8.4.0+415+e936cba3 RLSA-2022:1935
Rocky Linux 8 php-pecl-rrd 2.0.1-1.module+el8.4.0+414+2e7afcdd RLSA-2022:1935
Rocky Linux 8 php-pecl-xdebug 2.9.5-1.module+el8.4.0+415+e936cba3 RLSA-2022:1935
Rocky Linux 8 php-pecl-zip 1.18.2-1.module+el8.4.0+415+e936cba3 RLSA-2022:1935
ReleasePackageFixed inAdvisory
SLES 15 SP3 php7 7.4.6-3.22.1 SUSE-SU-2022:4069-1, SUSE-SU-2021:2637-1
SLES 15 SP2 php7 7.4.6-3.22.1 SUSE-SU-2022:4069-1, SUSE-SU-2021:2637-1
SLES 15 SP1 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4067-1
SLES 15 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4067-1
SLES 12 SP5 php72 7.2.5-1.63.2 SUSE-SU-2021:2564-1
SLES 12 SP5 php74 7.4.6-1.24.1 SUSE-SU-2022:4068-1, SUSE-SU-2021:2636-1
Show 12 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES 12 php72 7.2.5-1.63.2 SUSE-SU-2021:2564-1
SLES 12 php74 7.4.6-1.24.1 SUSE-SU-2022:4068-1, SUSE-SU-2021:2636-1
SLES for SAP 15 SP2 php7 7.4.33-150200.3.46.2 SUSE-SU-2022:4069-1
SLES for SAP 15 SP1 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4067-1
SLES for SAP 15 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4067-1
SLE HPC 15 SP2 php7 7.4.33-150200.3.46.2 SUSE-SU-2022:4069-1
SLE HPC 15 SP1 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4067-1
SLE HPC 15 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4067-1
SUSE Manager Server 4.1 php7 7.4.33-150200.3.46.2 SUSE-SU-2022:4069-1
SUSE Manager Retail Branch Server 4.1 php7 7.4.33-150200.3.46.2 SUSE-SU-2022:4069-1
SUSE Manager Proxy 4.1 php7 7.4.33-150200.3.46.2 SUSE-SU-2022:4069-1
SUSE Enterprise Storage 7 php7 7.4.33-150200.3.46.2 SUSE-SU-2022:4069-1
SUSE Enterprise Storage 6 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4067-1
ReleasePackageFixed inAdvisory
openSUSE Leap 15.4 php7 7.2.34-150000.4.103.1 SUSE-SU-2022:4069-1, SUSE-SU-2022:4067-1
openSUSE Leap 15.3 php7 7.2.5-4.76.5 openSUSE-SU-2021:2637-1, openSUSE-SU-2021:2575-1, SUSE-SU-2022:4069-1
openSUSE Leap 15.3 php7-test 7.4.33-150200.3.46.2 SUSE-SU-2022:4069-1
openSUSE Leap 15.2 php7 +1 7.4.6-lp152.2.18.1 openSUSE-SU-2021:1130-1
ReleasePackageFixed inAdvisory
Alpine v3.16 php8 8.0.8-r0 —
Alpine v3.15 php7 7.4.21-r0 —
Alpine v3.15 php8 8.0.8-r0 —
Alpine v3.14 php7 7.4.21-r0 —
Alpine v3.14 php8 8.0.8-r0 —
Alpine v3.13 php7 7.4.21-r0 —
Alpine v3.13 php8 8.0.8-r0 —
Alpine v3.12 php7 7.3.29-r0 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 8 apcu-panel +2 5.1.18-1.module+el8.3.0+7685+72d70b58 ELSA-2022-1935
Oracle Linux 8 libzip +2 1.6.1-1.module+el8.3.0+7685+72d70b58 ELSA-2022-1935
Oracle Linux 8 php +25 7.4.19-2.module+el8.6.0+20552+0a59ce9f ELSA-2022-1935
Oracle Linux 8 php-pear 1:1.10.12-1.module+el8.3.0+7685+72d70b58 ELSA-2022-1935
Oracle Linux 8 php-pecl-rrd 2.0.1-1.module+el8.3.0+7685+72d70b58 ELSA-2022-1935
Oracle Linux 8 php-pecl-xdebug 2.9.5-1.module+el8.3.0+7685+72d70b58 ELSA-2022-1935
Oracle Linux 8 php-pecl-zip 1.18.2-1.module+el8.3.0+7685+72d70b58 ELSA-2022-1935

Advisories 23

References