CVE-2021-32732

{"id": "CVE-2021-32732", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.8}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "published": "2022-02-04T23:15:11.547", "references": [{"url": "https://github.com/xwiki/xwiki-platform/commit/69548c0320cbd772540cf4668743e69f879812cf", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/xwiki/xwiki-platform/commit/f0440dfcbba705e03f7565cd88893dde57ca3fa8", "tags": ["Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/xwiki/xwiki-platform/security/advisories/GHSA-vh5c-jqfg-mhrh", "tags": ["Mitigation", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://jira.xwiki.org/browse/XWIKI-18384", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://jira.xwiki.org/browse/XWIKI-18408", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-352"}]}, {"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-352"}]}], "descriptions": [{"lang": "en", "value": "### Impact It's possible to know if a user has or not an account in a wiki related to an email address, and which username(s) is actually tied to that email by forging a request to the Forgot username page. Note that since this page does not have a CSRF check it's quite easy to perform a lot of those requests. ### Patches This issue has been patched in XWiki 12.10.5 and 13.2RC1. Two different patches are provided: - a first one to fix the CSRF problem - a more complex one that now relies on sending an email for the Forgot username process. ### Workarounds It's possible to fix the problem without uprading by editing the ForgotUsername page in version below 13.x, to use the following code: https://github.com/xwiki/xwiki-platform/blob/69548c0320cbd772540cf4668743e69f879812cf/xwiki-platform-core/xwiki-platform-administration/xwiki-platform-administration-ui/src/main/resources/XWiki/ForgotUsername.xml#L39-L123 In version after 13.x it's also possible to edit manually the forgotusername.vm file, but it's really encouraged to upgrade the version here. ### References * https://jira.xwiki.org/browse/XWIKI-18384 * https://jira.xwiki.org/browse/XWIKI-18408 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Jira XWiki](https://jira.xwiki.org) * Email us at [security ML](mailto:security@xwiki.org)"}, {"lang": "es", "value": "### Impacto Es posible saber si un usuario presenta o no una cuenta en un wiki relacionada con una direcci\u00f3n de correo electr\u00f3nico, y qu\u00e9 nombre(s) de usuario est\u00e1(n) realmente vinculado(s) a ese correo electr\u00f3nico al falsificar una petici\u00f3n a la p\u00e1gina de Nombre de usuario olvidado. Ten en cuenta que como esta p\u00e1gina no presenta una comprobaci\u00f3n de tipo CSRF es bastante f\u00e1cil llevar a cabo muchas de esas peticiones. ### Parches Este problema ha sido parcheado en XWiki versiones 12.10.5 y 13.2RC1. Se proporcionan dos parches diferentes: - uno para corregir el problema de CSRF - otro m\u00e1s complejo que ahora es basado en el env\u00edo de un correo electr\u00f3nico para el proceso Forgot username. ### Mitigaciones Es posible arreglar el problema sin actualizar al editar la p\u00e1gina de ForgotUsername en versiones anteriores a 13.x, para usar el siguiente c\u00f3digo: https://github.com/xwiki/xwiki-platform/blob/69548c0320cbd772540cf4668743e69f879812cf/xwiki-platform-core/xwiki-platform-administration/xwiki-platform-administration-ui/src/main/resources/XWiki/ForgotUsername.xml#L39-L123 En la versi\u00f3n posterior a 13.x tambi\u00e9n es posible editar manualmente el archivo forgotusername.vm, pero es recomendado actualizar la versi\u00f3n aqu\u00ed. References * https://jira.xwiki.org/browse/XWIKI-18384 * https://jira.xwiki.org/browse/XWIKI-18408 ###. Para m\u00e1s informaci\u00f3n Si presenta alguna pregunta o comentario sobre este aviso: * Abra una incidencia en [Jira XWiki](https://jira.xwiki.org) * Env\u00edenos un correo electr\u00f3nico a [security ML](mailto:security@xwiki.org)"}], "lastModified": "2022-02-10T18:39:12.117", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:xwiki:xwiki:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D3FA811-A9C4-45F7-A876-BB5D69DA7BCE", "versionEndExcluding": "12.10.5"}, {"criteria": "cpe:2.3:a:xwiki:xwiki:13.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E8ED2C6F-77E6-4B53-A52D-0CD7FA08AFD1"}, {"criteria": "cpe:2.3:a:xwiki:xwiki:13.1:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "333C6A66-CDCD-46DC-A095-74D35B076A78"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}