{
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    "cveMetadata": {
        "cveId": "CVE-2023-4255",
        "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "state": "PUBLISHED",
        "assignerShortName": "redhat",
        "dateReserved": "2023-08-08T20:16:01.838Z",
        "datePublished": "2023-12-21T16:08:39.691Z",
        "dateUpdated": "2024-08-02T07:24:03.587Z"
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    "containers": {
        "cna": {
            "title": "W3m: out-of-bounds write in function checktype() in etc.c (incomplete fix for cve-2022-38223)",
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                        "content": {
                            "value": "Moderate",
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                        "type": "Red Hat severity rating"
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                    "cvssV3_1": {
                        "attackComplexity": "LOW",
                        "attackVector": "LOCAL",
                        "availabilityImpact": "HIGH",
                        "baseScore": 5.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "NONE",
                        "scope": "UNCHANGED",
                        "userInteraction": "REQUIRED",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
                        "version": "3.1"
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            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "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."
                }
            ],
            "affected": [
                {
                    "product": "w3m",
                    "vendor": "n/a",
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                    "vendor": "Fedora",
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                    "name": "RHBZ#2255207",
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                    "url": "https://github.com/tats/w3m/issues/268"
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                    "url": "https://github.com/tats/w3m/pull/273"
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            "datePublic": "2023-06-12T00:00:00+00:00",
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                            "cweId": "CWE-787",
                            "description": "Out-of-bounds Write",
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            "x_redhatCweChain": "CWE-787: Out-of-bounds Write",
            "timeline": [
                {
                    "lang": "en",
                    "time": "2023-07-19T00:00:00+00:00",
                    "value": "Reported to Red Hat."
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                    "lang": "en",
                    "time": "2023-06-12T00:00:00+00:00",
                    "value": "Made public."
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "Red Hat would like to thank iskindar97@gmail.com for reporting this issue."
                }
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