UBUNTU-CVE-2020-16127

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    UBUNTU-CVE-2020-16127

    Published: 3 Nov 2020Last Modified: 22 Apr 2026
    Upstream:
    CVE-2020-16127
    Aliases:
    USN-4616-1

    Summary:

    Details: An Ubuntu-specific modification to AccountsService in versions before 0.6.55-0ubuntu13.2, among other earlier versions, would perform unbounded read operations on user-controlled ~/.pam_environment files, allowing an infinite loop if /dev/zero is symlinked to this location.

    References: https://ubuntu.com/security/CVE-2020-16127, https://ubuntu.com/security/notices/USN-4616-1, https://www.cve.org/CVERecord?id=CVE-2020-16127

    Affected packages

    Package

    Name: accountsservice

    Purl: pkg:deb/ubuntu/[email protected]~20.04.4?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.6.55-0ubuntu12~20.04.4

    Affected versions

    0.6.55-0ubuntu10
    0.6.55-0ubuntu11
    0.6.55-0ubuntu12~20.04.1
    0.6.55-0ubuntu12~20.04.2

    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
    UBUNTU-CVE-2020-16127 | CVE-DB