DEBIAN-CVE-2021-21424

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    DEBIAN-CVE-2021-21424

    Published: 13 May 2021Last Modified: 1 Sept 2026
    Upstream:
    CVE-2021-21424

    Summary:

    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: https://security-tracker.debian.org/tracker/CVE-2021-21424

    Affected packages

    Package

    Name: symfony

    Purl: pkg:deb/debian/symfony?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.4.19+dfsg-2

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    DEBIAN-CVE-2021-21424 | CVE-DB