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CVE-2021-21705

Published: 2 July 2021

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.

Priority

Medium

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
php5
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty
Released (5.5.9+dfsg-1ubuntu4.29+esm14)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream Needs triage

xenial Does not exist

php7.0
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial
Released (7.0.33-0ubuntu0.16.04.16+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
php7.2
Launchpad, Ubuntu, Debian
bionic
Released (7.2.24-0ubuntu0.18.04.8)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream Needs triage

xenial Does not exist

php7.4
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (7.4.3-4ubuntu2.5)
groovy
Released (7.4.9-1ubuntu1.2)
hirsute
Released (7.4.16-1ubuntu2.1)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (7.4.21)
xenial Does not exist

Patches:
upstream: https://github.com/php/php-src/commit/a5538c62293fa782fcc382d0635cfc0c8b9190e3
upstream: https://github.com/php/php-src/commit/7bab67c2d0d3c30b1176d5bcf6f20b0e1c50c589
php8.0
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (8.0.8)
xenial Does not exist

impish
Released (8.0.8-1)
php8.1
Launchpad, Ubuntu, Debian
impish Does not exist

jammy Not vulnerable
(8.1.0-1)
trusty Does not exist

upstream Needs triage

xenial Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact Low
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N