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    CVE-2020-14311

    There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.

    Published:Jul 29, 2020
    Last Modified:Nov 21, 2024
    EPS:Jul 31, 2020
    EPSS Score:0.00032
    CVSS Score:5.7

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Gnu
    Product
    Grub2
    Vendor
    Opensuse
    Product
    Leap
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Linux Eus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Aus
    Vendor
    Redhat
    Product
    Enterprise Linux Server Tus
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

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    References

    http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
    http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
    http://www.openwall.com/lists/oss-security/2021/09/17/2
    http://www.openwall.com/lists/oss-security/2021/09/17/4
    http://www.openwall.com/lists/oss-security/2021/09/21/1
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
    https://security.gentoo.org/glsa/202104-05
    https://usn.ubuntu.com/4432-1/
    http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
    http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
    http://www.openwall.com/lists/oss-security/2021/09/17/2
    http://www.openwall.com/lists/oss-security/2021/09/17/4
    http://www.openwall.com/lists/oss-security/2021/09/21/1
    https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-14311
    https://security.gentoo.org/glsa/202104-05
    https://usn.ubuntu.com/4432-1/

    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