CVE-2023-52081

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-52081", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2023-12-26T17:23:22.235Z", "datePublished": "2023-12-28T15:34:17.132Z", "dateUpdated": "2024-08-02T22:48:12.133Z"}, "containers": {"cna": {"title": "ewen-lbh/ffcss late-Unicode normalization vulnerability", "problemTypes": [{"descriptions": [{"cweId": "CWE-176", "lang": "en", "description": "CWE-176: Improper Handling of Unicode Encoding", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-74", "lang": "en", "description": "CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}}], "references": [{"name": "https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mh"}, {"name": "https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dc", "tags": ["x_refsource_MISC"], "url": "https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dc"}], "affected": [{"vendor": "ewen-lbh", "product": "ffcss", "versions": [{"version": "< 0.2.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2023-12-28T15:34:17.132Z"}, "descriptions": [{"lang": "en", "value": "ffcss is a CLI interface to apply and configure Firefox CSS themes. Prior to 0.2.0, the function `lookupPreprocess()` is meant to apply some transformations to a string by disabling characters in the regex `[-_ .]`. However, due to the use of late Unicode normalization of type NFKD, it is possible to bypass that validation and re-introduce all the characters in the regex `[-_ .]`. The `lookupPreprocess()` can be easily bypassed with equivalent Unicode characters like U+FE4D (\ufe4d), which would result in the omitted U+005F (_), for instance. The `lookupPreprocess()` function is only ever used to search for themes loosely (case insensitively, while ignoring dashes, underscores and dots), so the actual security impact is classified as low. This vulnerability is fixed in 0.2.0. There are no known workarounds."}], "source": {"advisory": "GHSA-wpmx-564x-h2mh", "discovery": "UNKNOWN"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T22:48:12.133Z"}, "title": "CVE Program Container", "references": [{"name": "https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mh", "tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mh"}, {"name": "https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dc", "tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dc"}]}]}}

{}

{"affected": [{"affectedData": [{"product": "ffcss", "vendor": "ewen-lbh", "versions": [{"status": "affected", "version": "< 0.2.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:ewen-lbh:firefox_css:*:*:*:*:*:go:*:*", "matchCriteriaId": "BD1EE5E4-A11D-4E6C-83E6-BB649FB7643D", "versionEndExcluding": "0.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "ffcss is a CLI interface to apply and configure Firefox CSS themes. Prior to 0.2.0, the function `lookupPreprocess()` is meant to apply some transformations to a string by disabling characters in the regex `[-_ .]`. However, due to the use of late Unicode normalization of type NFKD, it is possible to bypass that validation and re-introduce all the characters in the regex `[-_ .]`. The `lookupPreprocess()` can be easily bypassed with equivalent Unicode characters like U+FE4D (\ufe4d), which would result in the omitted U+005F (_), for instance. The `lookupPreprocess()` function is only ever used to search for themes loosely (case insensitively, while ignoring dashes, underscores and dots), so the actual security impact is classified as low. This vulnerability is fixed in 0.2.0. There are no known workarounds."}, {"lang": "es", "value": "ffcss es una interfaz CLI para aplicar y configurar temas CSS de Firefox. Antes de 0.2.0, la funci\u00f3n `lookupPreprocess()` estaba destinada a aplicar algunas transformaciones a una cadena deshabilitando caracteres en la expresi\u00f3n regular `[-_ .]`. Sin embargo, debido al uso de la normalizaci\u00f3n Unicode tard\u00eda del tipo NFKD, es posible omitir esa validaci\u00f3n y volver a introducir todos los caracteres en la expresi\u00f3n regular `[-_ .]`. El `lookupPreprocess()` se puede omitir f\u00e1cilmente con caracteres Unicode equivalentes como U+FE4D (?), lo que dar\u00eda como resultado U+005F (_) omitido, por ejemplo. La funci\u00f3n `lookupPreprocess()` s\u00f3lo se utiliza para buscar temas de forma flexible (sin distinguir entre may\u00fasculas y min\u00fasculas, ignorando guiones, guiones bajos y puntos), por lo que el impacto real en la seguridad se clasifica como bajo. Esta vulnerabilidad se solucion\u00f3 en 0.2.0. No se conocen workarounds."}], "id": "CVE-2023-52081", "lastModified": "2026-06-17T06:42:02.147", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2023-12-28T16:16:02.090", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dc"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mh"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://github.com/ewen-lbh/ffcss/commit/f9c491874b858a32fcae15045f169fd7d02f90dc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/ewen-lbh/ffcss/security/advisories/GHSA-wpmx-564x-h2mh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-74"}, {"lang": "en", "value": "CWE-176"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-74"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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