CVE-2020-26312

{"id": "CVE-2020-26312", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 2.8}]}, "published": "2024-05-14T21:15:10.587", "references": [{"url": "https://github.com/dotmesh-io/dotmesh/blob/master/pkg/archiver/tar.go#L255", "source": "security-advisories@github.com"}, {"url": "https://securitylab.github.com/advisories/GHSL-2020-254-zipslip-dotmesh/", "source": "security-advisories@github.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "Dotmesh is a git-like command-line interface for capturing, organizing and sharing application states. In versions 0.8.1 and prior, the unsafe handling of symbolic links in an unpacking routine may \nenable attackers to read and/or write to arbitrary locations outside the\n designated target folder.\u00a0The routine `untarFile` attempts to guard against creating symbolic links that point outside the directory a tar archive is extracted to. However, a malicious tarball first linking `subdir/parent` to `..` (allowed, because `subdir/..` falls within the archive root) and then linking `subdir/parent/escapes` to `..` results in a symbolic link pointing to the tarball\u2019s parent directory, contrary to the routine\u2019s goals. This issue may lead to arbitrary file write (with same permissions as the program running the unpack operation) if the attacker can control the archive file. Additionally, if the attacker has read access to the unpacked files, they may be able to read arbitrary system files the parent process has permissions to read. As of time of publication, no patch for this issue is available.\n"}, {"lang": "es", "value": "Dotmesh es una interfaz de l\u00ednea de comandos similar a git para capturar, organizar y compartir estados de aplicaciones. En las versiones 0.8.1 y anteriores, el manejo inseguro de enlaces simb\u00f3licos en una rutina de descompresi\u00f3n puede permitir a los atacantes leer y/o escribir en ubicaciones arbitrarias fuera de la carpeta de destino designada. La rutina `untarFile` intenta evitar la creaci\u00f3n de enlaces simb\u00f3licos que apunten fuera del directorio al que se extrae un archivo tar. Sin embargo, un tarball malicioso que primero vincula `subdir/parent` a `..` (permitido, porque `subdir/..` se encuentra dentro de la ra\u00edz del archivo) y luego vincula `subdir/parent/escapes` a `..` da como resultado un enlace simb\u00f3lico que apunta al directorio principal del tarball, contrario a los objetivos de la rutina. Este problema puede provocar la escritura arbitraria de archivos (con los mismos permisos que el programa que ejecuta la operaci\u00f3n de descomprimir) si el atacante puede controlar el archivo comprimido. Adem\u00e1s, si el atacante tiene acceso de lectura a los archivos descomprimidos, es posible que pueda leer archivos arbitrarios del sistema para los que el proceso principal tiene permisos de lectura. Al momento de la publicaci\u00f3n, no hay ning\u00fan parche disponible para este problema."}], "lastModified": "2024-05-15T16:40:19.330", "sourceIdentifier": "security-advisories@github.com"}