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    CVE-2019-11191

    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

    Published:Apr 3, 2019
    Last Modified:Nov 21, 2024
    EPS:Apr 11, 2019
    EPSS Score:0.00005
    CVSS Score:2.5

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel

    Exploits

    https://www.openwall.com/lists/oss-security/2019/04/03/4https://www.openwall.com/lists/oss-security/2019/04/03/4/1https://www.openwall.com/lists/oss-security/2019/04/03/4https://www.openwall.com/lists/oss-security/2019/04/03/4/1

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    References

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

    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