CVE-2025-62491

{"id": "CVE-2025-62491", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-62491", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2025-10-16T18:03:58.190903Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "cve-coordination@google.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.8, "Automatable": "NOT_DEFINED", "attackVector": "ADJACENT", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/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": "PASSIVE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "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"}}]}, "affected": [{"source": "cve-coordination@google.com", "affectedData": [{"vendor": "QuickJS", "product": "QuickJS", "versions": [{"status": "affected", "version": "2025-04-26", "lessThan": "2025-09-13", "versionType": "date"}], "packageName": "js_std_promise_rejection_check", "collectionURL": "https://bellard.org/quickjs/", "defaultStatus": "unaffected"}]}], "published": "2025-10-16T16:15:39.470", "references": [{"url": "https://bellard.org/quickjs/Changelog", "tags": ["Release Notes"], "source": "cve-coordination@google.com"}, {"url": "https://issuetracker.google.com/434195203", "tags": ["Exploit", "Issue Tracking"], "source": "cve-coordination@google.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve-coordination@google.com", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "A Use-After-Free (UAF) vulnerability exists in the QuickJS engine's standard library when iterating over the global list of unhandled rejected promises (ts->rejected_promise_list).\n\n * The function js_std_promise_rejection_check attempts to iterate over the rejected_promise_list to report unhandled rejections using a standard list loop.\n\n\n * The reason for a promise rejection is processed inside the loop, including calling js_std_dump_error1(ctx, rp->reason).\n\n\n * If the promise rejection reason is an Error object that defines a custom property getter (e.g., via Object.defineProperty), this getter is executed during the error dumping process.\n\n\n * The malicious custom getter can execute JavaScript code that calls catch() on the same rejected promise being processed.\n\n\n * Calling catch() internally triggers js_std_promise_rejection_tracker, which then removes and frees the current promise entry (JSRejectedPromiseEntry) from the rejected_promise_list.\n\n\n * Since the list iteration continues using the now-freed memory pointer (el), the subsequent loop access results in a Use-After-Free condition."}, {"lang": "es", "value": "Una vulnerabilidad de uso despu\u00e9s de liberaci\u00f3n (UAF) existe en la biblioteca est\u00e1ndar del motor QuickJS al iterar sobre la lista global de promesas rechazadas no manejadas (ts -> rejected_promise_list).\n\n * La funci\u00f3n js_std_promise_rejection_check intenta iterar sobre la rejected_promise_list para informar rechazos no manejados utilizando un bucle de lista est\u00e1ndar.\n\n * La raz\u00f3n de un rechazo de promesa se procesa dentro del bucle, incluyendo la llamada a js_std_dump_error1(ctx, rp -> reason).\n\n * Si la raz\u00f3n del rechazo de la promesa es un objeto Error que define un getter de propiedad personalizado (por ejemplo, a trav\u00e9s de Object.defineProperty), este getter se ejecuta durante el proceso de volcado de errores.\n\n * El getter personalizado malicioso puede ejecutar c\u00f3digo JavaScript que llama a catch() en la misma promesa rechazada que se est\u00e1 procesando.\n\n * La llamada a catch() internamente activa js_std_promise_rejection_tracker, que luego elimina y libera la entrada de promesa actual (JSRejectedPromiseEntry) de la rejected_promise_list.\n\n * Dado que la iteraci\u00f3n de la lista contin\u00faa utilizando el puntero de memoria ahora liberado (el), el acceso posterior del bucle resulta en una condici\u00f3n de uso despu\u00e9s de liberaci\u00f3n."}], "lastModified": "2026-10-19T16:10:00.260", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:quickjs_project:quickjs:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AB84E2DC-74EA-4956-9521-C2B652B8E8C2", "versionEndExcluding": "2025-09-13"}], "operator": "OR"}]}], "sourceIdentifier": "cve-coordination@google.com"}