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    CVE-2023-4255

    An out-of-bounds write issue has been discovered in the backspace handling of the checkType() function in etc.c within the W3M application. This vulnerability is triggered by supplying a specially crafted HTML file to the w3m binary. Exploitation of this flaw could lead to application crashes, resulting in a denial of service condition.

    Published:Dec 21, 2023
    Last Modified:Feb 13, 2025
    EPS:Dec 21, 2023
    EPSS Score:0.00016
    CVSS Score:5.5

    Affected Products

    Vendor
    Fedoraproject
    Product
    Extra Packages For Enterprise Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Tats
    Product
    W3m

    Exploits

    https://github.com/tats/w3m/issues/268https://github.com/tats/w3m/issues/268

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://bugzilla.redhat.com/show_bug.cgi?id=2255207
    https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3
    https://github.com/tats/w3m/issues/268
    https://github.com/tats/w3m/pull/273
    https://lists.fedoraproject.org/archives/list/[email protected]/message/AULOBQJLXE2KCT5UVQMKGEFL4GFIAOED/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/MKFZQUK7FPWWJQYICDZZ4YWIPUPQ2D3R/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/TODROGVCWZ435HQIZE6ARQC5LPQLIA5C/
    https://bugzilla.redhat.com/show_bug.cgi?id=2255207
    https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3
    https://github.com/tats/w3m/issues/268
    https://github.com/tats/w3m/pull/273
    https://lists.fedoraproject.org/archives/list/[email protected]/message/AULOBQJLXE2KCT5UVQMKGEFL4GFIAOED/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/MKFZQUK7FPWWJQYICDZZ4YWIPUPQ2D3R/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/TODROGVCWZ435HQIZE6ARQC5LPQLIA5C/

    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