CVE-2023-4255

    Dashboard / Vulnerabilities / CVE-2023-4255

    CVE-2023-4255

    Published: 21 Dec 2023Last Modified: 12 Aug 2026

    Summary: W3m: out-of-bounds write in function checktype() in etc.c (incomplete fix for cve-2022-38223)

    Details: 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.

    References: 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://packages.fedoraproject.org/, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/4xxx/CVE-2023-4255.json, https://nvd.nist.gov/vuln/detail/CVE-2023-4255, https://bugzilla.redhat.com/show_bug.cgi?id=2255207, https://github.com/tats/w3m/issues/268, https://github.com/tats/w3m/commit/edc602651c506aeeb60544b55534dd1722a340d3, https://github.com/tats/w3m/pull/273

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- fee038d7180e3d69276f55167a0d1da5233bc9c2
    Fixed -edc602651c506aeeb60544b55534dd1722a340d3

    Affected versions

    0.5.3+git20230121-1
    0.5.3+git20230121-2

    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
    CVE-2023-4255 | CVE-DB