UBUNTU-CVE-2021-21424

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Source
https://ubuntu.com/security/CVE-2021-21424
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-21424.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2021-21424
Upstream
Downstream
Related
Published
2021-05-13T16:15:00Z
Modified
2025-07-16T08:26:01.484855Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
  • Ubuntu - low
Summary
[none]
Details

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The ability to enumerate users was possible without relevant permissions due to different handling depending on whether the user existed or not when attempting to use the switch users functionality. We now ensure that 403s are returned whether the user exists or not if a user cannot switch to a user or if the user does not exist. The patch for this issue is available for branch 3.4.

References

Affected packages

Ubuntu:Pro:18.04:LTS / symfony

Package

Name
symfony
Purl
pkg:deb/ubuntu/symfony@3.4.6+dfsg-1ubuntu0.1+esm2?arch=source&distro=esm-apps/bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.4.6+dfsg-1ubuntu0.1+esm2

Affected versions

2.*

2.8.7+dfsg-1.3ubuntu1

3.*

3.4.3+dfsg-1ubuntu4
3.4.6+dfsg-1
3.4.6+dfsg-1ubuntu0.1
3.4.6+dfsg-1ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-symfony",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-asset",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-browser-kit",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-cache",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-class-loader",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-config",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-console",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-css-selector",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-debug",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-debug-bundle",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-dependency-injection",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-doctrine-bridge",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-dom-crawler",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-dotenv",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-event-dispatcher",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-expression-language",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-filesystem",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-finder",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-form",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-framework-bundle",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-http-foundation",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-http-kernel",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-inflector",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-intl",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-ldap",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-lock",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-monolog-bridge",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-options-resolver",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-phpunit-bridge",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-process",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-property-access",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-property-info",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-proxy-manager-bridge",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-routing",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-security",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-security-bundle",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-security-core",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-security-csrf",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-security-guard",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-security-http",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-serializer",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-stopwatch",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-templating",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-translation",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-twig-bridge",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-twig-bundle",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-validator",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-var-dumper",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-web-link",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-web-profiler-bundle",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-web-server-bundle",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-workflow",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "php-symfony-yaml",
            "binary_version": "3.4.6+dfsg-1ubuntu0.1+esm2"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}

Ubuntu:Pro:20.04:LTS / symfony

Package

Name
symfony
Purl
pkg:deb/ubuntu/symfony@4.3.8+dfsg-1ubuntu1+esm1?arch=source&distro=esm-apps/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.8+dfsg-1ubuntu1+esm1

Affected versions

4.*

4.3.4+dfsg-1ubuntu1
4.3.8+dfsg-1ubuntu1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "php-symfony",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-amazon-mailer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-asset",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-browser-kit",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-cache",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-config",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-console",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-css-selector",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-debug",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-debug-bundle",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-dependency-injection",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-doctrine-bridge",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-dom-crawler",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-dotenv",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-event-dispatcher",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-expression-language",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-filesystem",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-finder",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-form",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-framework-bundle",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-google-mailer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-http-client",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-http-foundation",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-http-kernel",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-inflector",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-intl",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-ldap",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-lock",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-mailchimp-mailer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-mailer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-mailgun-mailer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-messenger",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-mime",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-monolog-bridge",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-options-resolver",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-phpunit-bridge",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-postmark-mailer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-process",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-property-access",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-property-info",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-proxy-manager-bridge",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-routing",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-security",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-security-bundle",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-security-core",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-security-csrf",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-security-guard",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-security-http",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-sendgrid-mailer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-serializer",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-stopwatch",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-templating",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-translation",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-twig-bridge",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-twig-bundle",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-validator",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-var-dumper",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-var-exporter",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-web-link",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-web-profiler-bundle",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-web-server-bundle",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-workflow",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        },
        {
            "binary_name": "php-symfony-yaml",
            "binary_version": "4.3.8+dfsg-1ubuntu1+esm1"
        }
    ],
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro"
}