CVE-2025-34092

{"id": "CVE-2025-34092", "cveTags": [], "metrics": {"cvssMetricV40": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 9.3, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "CRITICAL", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-07-02T20:15:30.413", "references": [{"url": "https://vulncheck.com/advisories/google-chrome-appbound-cookie-encryption", "source": "disclosure@vulncheck.com"}, {"url": "https://www.cyberark.com/resources/threat-research-blog/c4-bomb-blowing-up-chromes-appbound-cookie-encryption", "source": "disclosure@vulncheck.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "disclosure@vulncheck.com", "description": [{"lang": "en", "value": "CWE-287"}, {"lang": "en", "value": "CWE-290"}, {"lang": "en", "value": "CWE-706"}]}], "descriptions": [{"lang": "en", "value": "A cookie encryption bypass vulnerability exists in Google Chrome\u2019s AppBound mechanism due to weak path validation logic within the elevation service. When Chrome encrypts a cookie key, it records its own executable path as validation metadata. Later, when decrypting, the elevation service compares the requesting process\u2019s path to this stored path. However, due to path canonicalization inconsistencies, an attacker can impersonate Chrome (e.g., by naming their binary chrome.exe and placing it in a similar path) and successfully retrieve the encrypted cookie key. This allows malicious processes to retrieve cookies intended to be restricted to the Chrome process only.\n\nConfirmed in Google Chrome with AppBound Encryption enabled. Other Chromium-based browsers may be affected if they implement similar COM-based encryption mechanisms."}, {"lang": "es", "value": "Existe una vulnerabilidad de omisi\u00f3n del cifrado de cookies en el mecanismo AppBound de Google Chrome debido a una l\u00f3gica de validaci\u00f3n de rutas d\u00e9bil dentro del servicio de elevaci\u00f3n. Cuando Chrome cifra una clave de cookie, registra su propia ruta ejecutable como metadatos de validaci\u00f3n. Posteriormente, al descifrar, el servicio de elevaci\u00f3n compara la ruta del proceso solicitante con esta ruta almacenada. Sin embargo, debido a inconsistencias en la canonizaci\u00f3n de rutas, un atacante puede suplantar la identidad de Chrome (por ejemplo, nombrando su binario chrome.exe y coloc\u00e1ndolo en una ruta similar) y recuperar con \u00e9xito la clave de cookie cifrada. Esto permite que procesos maliciosos recuperen cookies destinadas a estar restringidas \u00fanicamente al proceso de Chrome. Confirmado en Google Chrome con el cifrado AppBound habilitado. Otros navegadores basados en Chromium podr\u00edan verse afectados si implementan mecanismos de cifrado basados en COM similares."}], "lastModified": "2025-07-03T15:13:53.147", "sourceIdentifier": "disclosure@vulncheck.com"}