CVE-2019-11191

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    CVE-2019-11191

    Published: 12 Apr 2019Last Modified: 15 Mar 2026

    Summary:

    Details: The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported

    References: https://usn.ubuntu.com/4007-1/, http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html, https://usn.ubuntu.com/4007-2/, https://usn.ubuntu.com/4008-1/, https://usn.ubuntu.com/4008-3/, http://www.openwall.com/lists/oss-security/2019/05/22/7, https://usn.ubuntu.com/4006-1/, https://usn.ubuntu.com/4006-2/, http://www.securityfocus.com/bid/107887, http://www.openwall.com/lists/oss-security/2019/04/18/5, https://www.openwall.com/lists/oss-security/2019/04/03/4, https://www.openwall.com/lists/oss-security/2019/04/03/4/1

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    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