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    CVE-2020-28974

    A slab-out-of-bounds read in fbcon in the Linux kernel before 5.9.7 could be used by local attackers to read privileged information or potentially crash the kernel, aka CID-3c4e0dff2095. This occurs because KD_FONT_OP_COPY in drivers/tty/vt/vt.c can be used for manipulations such as font height.

    Published:Nov 9, 2020
    Last Modified:Nov 21, 2024
    EPS:Nov 20, 2020
    EPSS Score:0.00059
    CVSS Score:5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    https://seclists.org/oss-sec/2020/q4/104https://seclists.org/oss-sec/2020/q4/104

    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://www.openwall.com/lists/oss-security/2020/11/25/1
    https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804
    https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
    https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
    https://seclists.org/oss-sec/2020/q4/104
    https://security.netapp.com/advisory/ntap-20210108-0003/
    http://www.openwall.com/lists/oss-security/2020/11/25/1
    https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9.7
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3c4e0dff2095c579b142d5a0693257f1c58b4804
    https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
    https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
    https://seclists.org/oss-sec/2020/q4/104
    https://security.netapp.com/advisory/ntap-20210108-0003/

    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