CVE-2023-36811

{"id": "CVE-2023-36811", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.0}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.0}]}, "published": "2023-08-30T18:15:09.487", "references": [{"url": "https://github.com/borgbackup/borg/blob/1.2.5-cvedocs/docs/changes.rst#pre-125-archives-spoofing-vulnerability-cve-2023-36811", "tags": ["Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/borgbackup/borg/commit/3eb070191da10c2d3f7bc6484cf3d51c3045f884", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/borgbackup/borg/security/advisories/GHSA-8fjr-hghr-4m99", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5Q3OHXERTU547SEQ3YREZXHOCYNLVD63/", "source": "security-advisories@github.com"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XOZDFIYEBIOKSIEAXUJJJFUJTAJ7TF3C/", "source": "security-advisories@github.com"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUCQSMAWOJBCRGF6XPKEZ2TPGAPNKIWV/", "source": "security-advisories@github.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-347"}]}], "descriptions": [{"lang": "en", "value": "borgbackup is an opensource, deduplicating archiver with compression and authenticated encryption. A flaw in the cryptographic authentication scheme in borgbackup allowed an attacker to fake archives and potentially indirectly cause backup data loss in the repository. The attack requires an attacker to be able to: 1. insert files (with no additional headers) into backups and 2. gain write access to the repository. This vulnerability does not disclose plaintext to the attacker, nor does it affect the authenticity of existing archives. Creating plausible fake archives may be feasible for empty or small archives, but is unlikely for large archives. The issue has been fixed in borgbackup 1.2.5. Users are advised to upgrade. Additionally to installing the fixed code, users must follow the upgrade procedure as documented in the change log. Data loss after being attacked can be avoided by reviewing the archives (timestamp and contents valid and as expected) after any \"borg check --repair\" and before \"borg prune\". There are no known workarounds for this vulnerability."}, {"lang": "es", "value": "borgbackup es un archivador de duplicaci\u00f3n de c\u00f3digo abierto con compresi\u00f3n y cifrado autenticado. Una falla en el esquema de autenticaci\u00f3n criptogr\u00e1fica en borgbackup permiti\u00f3 a un atacante falsificar archivos y potencialmente causar indirectamente la p\u00e9rdida de datos de los respaldo en el repositorio. El ataque requiere que un atacante pueda: 1. insertar archivos (sin encabezados adicionales) en las copias de seguridad y 2. obtener acceso de escritura al repositorio. Esta vulnerabilidad no revela texto sin formato al atacante ni afecta la autenticidad de los archivos existentes. La creaci\u00f3n de archivos falsos plausibles puede ser factible para archivos vac\u00edos o peque\u00f1os, pero es poco probable para archivos grandes. El problema se solucion\u00f3 en borgbackup 1.2.5. Se recomienda a los usuarios que actualicen. Adem\u00e1s de instalar el c\u00f3digo fijo, los usuarios deben seguir el procedimiento de actualizaci\u00f3n como se documenta en el registro de cambios. La p\u00e9rdida de datos despu\u00e9s de un ataque se puede evitar revisando los archivos (marca de tiempo y contenido v\u00e1lidos y esperados) despu\u00e9s de cualquier \"borg check --repair\" y antes de \"borg prune\". No se conocen workarounds para esta vulnerabilidad."}], "lastModified": "2023-09-15T22:15:13.833", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:borgbackup:borg:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "61C2D872-E840-4067-8CEE-A9DB11B89028", "versionEndExcluding": "1.2.5"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}