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    CVE-2020-9391

    An issue was discovered in the Linux kernel 5.4 and 5.5 through 5.5.6 on the AArch64 architecture. It ignores the top byte in the address passed to the brk system call, potentially moving the memory break downwards when the application expects it to move upwards, aka CID-dcde237319e6. This has been observed to cause heap corruption with the GNU C Library malloc implementation.

    Published:Feb 25, 2020
    Last Modified:Nov 21, 2024
    EPS:Feb 25, 2020
    EPSS Score:0.00161
    CVSS Score:5.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Netapp
    Product
    Active Iq Unified Manager
    Vendor
    Netapp
    Product
    Cloud Backup
    Vendor
    Netapp
    Product
    Data Availability Services
    Vendor
    Netapp
    Product
    H410c
    Vendor
    Netapp
    Product
    H410c Firmware
    Vendor
    Netapp
    Product
    Hci Management Node
    Vendor
    Netapp
    Product
    Solidfire
    Vendor
    Netapp
    Product
    Steelstore Cloud Integrated Storage

    Exploits

    http://www.openwall.com/lists/oss-security/2020/02/25/6https://bugzilla.redhat.com/show_bug.cgi?id=1797052http://www.openwall.com/lists/oss-security/2020/02/25/6https://bugzilla.redhat.com/show_bug.cgi?id=1797052

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    References

    http://www.openwall.com/lists/oss-security/2020/02/25/6
    https://bugzilla.redhat.com/show_bug.cgi?id=1797052
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dcde237319e626d1ec3c9d8b7613032f0fd4663a
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O4LH35HOPBJIKYHYFXMBBM75DN75PZHZ/
    https://security.netapp.com/advisory/ntap-20200313-0003/
    http://www.openwall.com/lists/oss-security/2020/02/25/6
    https://bugzilla.redhat.com/show_bug.cgi?id=1797052
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dcde237319e626d1ec3c9d8b7613032f0fd4663a
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/O4LH35HOPBJIKYHYFXMBBM75DN75PZHZ/
    https://security.netapp.com/advisory/ntap-20200313-0003/

    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