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CVE-2021-21705

CVE-2021-21705 · Incorrect URL validation in FILTER_VALIDATE_URL

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 4.3 · Medium · EPSS 2.1% · Fix available

Published
Updated

Stack: system · php

Affected products and versions

  • php

    Versions
    • ≥ 7.3.x, < 7.3.29: Affected (custom)
    • ≥ 7.4.x, < 7.4.21: Affected (custom)
    • ≥ 8.0.X, < 8.0.8: Affected (custom)

    Update to 7.3.29; Update to 7.4.21; Update to 8.0.8

  • php7.4 Debian:11

    Affected ranges
    • ECOSYSTEM: < 7.4.21-1+deb11u1

    Update to 7.4.21-1+deb11u1

  • php5 Ubuntu:Pro:14.04:LTS

    Versions
    • 5.5.3+dfsg-1ubuntu2
    • 5.5.3+dfsg-1ubuntu3
    • 5.5.6+dfsg-1ubuntu1
    • 5.5.6+dfsg-1ubuntu2
    • 5.5.8+dfsg-2ubuntu1
    • 5.5.9+dfsg-1ubuntu1
    • 5.5.9+dfsg-1ubuntu2
    • 5.5.9+dfsg-1ubuntu3
    • 5.5.9+dfsg-1ubuntu4
    • 5.5.9+dfsg-1ubuntu4.1
    • 5.5.9+dfsg-1ubuntu4.2
    • 5.5.9+dfsg-1ubuntu4.3
    • 5.5.9+dfsg-1ubuntu4.4
    • 5.5.9+dfsg-1ubuntu4.5
    • 5.5.9+dfsg-1ubuntu4.6
    • 5.5.9+dfsg-1ubuntu4.7
    • 5.5.9+dfsg-1ubuntu4.9
    • 5.5.9+dfsg-1ubuntu4.11
    • 5.5.9+dfsg-1ubuntu4.12
    • 5.5.9+dfsg-1ubuntu4.13
    • 5.5.9+dfsg-1ubuntu4.14
    • 5.5.9+dfsg-1ubuntu4.16
    • 5.5.9+dfsg-1ubuntu4.17
    • 5.5.9+dfsg-1ubuntu4.19
    • 5.5.9+dfsg-1ubuntu4.20
    • 5.5.9+dfsg-1ubuntu4.21
    • 5.5.9+dfsg-1ubuntu4.22
    • 5.5.9+dfsg-1ubuntu4.23
    • 5.5.9+dfsg-1ubuntu4.24
    • 5.5.9+dfsg-1ubuntu4.25
    • 5.5.9+dfsg-1ubuntu4.26
    • 5.5.9+dfsg-1ubuntu4.27
    • 5.5.9+dfsg-1ubuntu4.29
    • 5.5.9+dfsg-1ubuntu4.29+esm1
    • 5.5.9+dfsg-1ubuntu4.29+esm2
    • 5.5.9+dfsg-1ubuntu4.29+esm3
    • 5.5.9+dfsg-1ubuntu4.29+esm4
    • 5.5.9+dfsg-1ubuntu4.29+esm5
    • 5.5.9+dfsg-1ubuntu4.29+esm6
    • 5.5.9+dfsg-1ubuntu4.29+esm8
    • 5.5.9+dfsg-1ubuntu4.29+esm10
    • 5.5.9+dfsg-1ubuntu4.29+esm11
    • 5.5.9+dfsg-1ubuntu4.29+esm12
    • 5.5.9+dfsg-1ubuntu4.29+esm13
    Affected ranges
    • ECOSYSTEM: < 5.5.9+dfsg-1ubuntu4.29+esm14

    Update to 5.5.9+dfsg-1ubuntu4.29+esm14

  • php7.0 Ubuntu:Pro:16.04:LTS

    Versions
    • 7.0.1-5
    • 7.0.1-6
    • 7.0.2-1
    • 7.0.2-3
    • 7.0.2-4
    • 7.0.2-5
    • 7.0.3-2
    • 7.0.3-3
    • 7.0.3-9ubuntu1
    • 7.0.4-5ubuntu1
    • 7.0.4-5ubuntu2
    • 7.0.4-7ubuntu1
    • 7.0.4-7ubuntu2
    • 7.0.4-7ubuntu2.1
    • 7.0.8-0ubuntu0.16.04.1
    • 7.0.8-0ubuntu0.16.04.2
    • 7.0.8-0ubuntu0.16.04.3
    • 7.0.13-0ubuntu0.16.04.1
    • 7.0.15-0ubuntu0.16.04.1
    • 7.0.15-0ubuntu0.16.04.2
    • 7.0.15-0ubuntu0.16.04.4
    • 7.0.18-0ubuntu0.16.04.1
    • 7.0.22-0ubuntu0.16.04.1
    • 7.0.25-0ubuntu0.16.04.1
    • 7.0.28-0ubuntu0.16.04.1
    • 7.0.30-0ubuntu0.16.04.1
    • 7.0.32-0ubuntu0.16.04.1
    • 7.0.33-0ubuntu0.16.04.1
    • 7.0.33-0ubuntu0.16.04.2
    • 7.0.33-0ubuntu0.16.04.3
    • 7.0.33-0ubuntu0.16.04.4
    • 7.0.33-0ubuntu0.16.04.5
    • 7.0.33-0ubuntu0.16.04.6
    • 7.0.33-0ubuntu0.16.04.7
    • 7.0.33-0ubuntu0.16.04.9
    • 7.0.33-0ubuntu0.16.04.11
    • 7.0.33-0ubuntu0.16.04.12
    • 7.0.33-0ubuntu0.16.04.14
    • 7.0.33-0ubuntu0.16.04.15
    • 7.0.33-0ubuntu0.16.04.16
    Affected ranges
    • ECOSYSTEM: < 7.0.33-0ubuntu0.16.04.16+esm1

    Update to 7.0.33-0ubuntu0.16.04.16+esm1

  • php7.2 Ubuntu:18.04:LTS

    Versions
    • 7.2.1-1ubuntu2
    • 7.2.2-1ubuntu1
    • 7.2.2-1ubuntu2
    • 7.2.3-1ubuntu1
    • 7.2.5-0ubuntu0.18.04.1
    • 7.2.7-0ubuntu0.18.04.1
    • 7.2.7-0ubuntu0.18.04.2
    • 7.2.10-0ubuntu0.18.04.1
    • 7.2.15-0ubuntu0.18.04.1
    • 7.2.15-0ubuntu0.18.04.2
    • 7.2.17-0ubuntu0.18.04.1
    • 7.2.19-0ubuntu0.18.04.1
    • 7.2.19-0ubuntu0.18.04.2
    • 7.2.24-0ubuntu0.18.04.1
    • 7.2.24-0ubuntu0.18.04.2
    • 7.2.24-0ubuntu0.18.04.3
    • 7.2.24-0ubuntu0.18.04.4
    • 7.2.24-0ubuntu0.18.04.6
    • 7.2.24-0ubuntu0.18.04.7
    Affected ranges
    • ECOSYSTEM: < 7.2.24-0ubuntu0.18.04.8

    Update to 7.2.24-0ubuntu0.18.04.8

  • php7.4 Ubuntu:20.04:LTS

    Versions
    • 7.4.3-4build1
    • 7.4.3-4build2
    • 7.4.3-4ubuntu1
    • 7.4.3-4ubuntu1.1
    • 7.4.3-4ubuntu2.2
    • 7.4.3-4ubuntu2.4
    Affected ranges
    • ECOSYSTEM: < 7.4.3-4ubuntu2.5

    Update to 7.4.3-4ubuntu2.5

Original sources

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