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    CVE-2019-20021

    A heap-based buffer over-read was discovered in canUnpack in p_mach.cpp in UPX 3.95 via a crafted Mach-O file.

    Published:Dec 27, 2019
    Last Modified:Apr 11, 2025
    EPS:Dec 27, 2019
    EPSS Score:0.00339
    CVSS Score:5.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Upx
    Product
    Upx

    Exploits

    https://github.com/upx/upx/issues/315https://github.com/upx/upx/issues/315

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    References

    http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html
    http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html
    https://github.com/upx/upx/issues/315
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE/
    http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00003.html
    http://lists.opensuse.org/opensuse-security-announce/2020-02/msg00007.html
    https://github.com/upx/upx/issues/315
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D7XU42G6MUQQXHWRP7DCF2JSIBOJ5GOO/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EUTVSTXAFTD552NO2K2RIF6MDQEHP3BE/

    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