CVE-2021-47353

{"id": "CVE-2021-47353", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-05-21T15:15:21.693", "references": [{"url": "https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix NULL pointer dereference in udf_symlink function\n\nIn function udf_symlink, epos.bh is assigned with the value returned\nby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c\nand returns the value of sb_getblk function that could be NULL.\nThen, epos.bh is used without any check, causing a possible\nNULL pointer dereference when sb_getblk fails.\n\nThis fix adds a check to validate the value of epos.bh."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: udf: Se corrigi\u00f3 la desreferencia del puntero NULL en la funci\u00f3n udf_symlink. En la funci\u00f3n udf_symlink, a epos.bh se le asigna el valor devuelto por udf_tgetblk. La funci\u00f3n udf_tgetblk est\u00e1 definida en udf/misc.c y devuelve el valor de la funci\u00f3n sb_getblk que podr\u00eda ser NULL. Luego, epos.bh se usa sin ninguna verificaci\u00f3n, lo que provoca una posible desreferencia del puntero NULL cuando falla sb_getblk. Esta soluci\u00f3n agrega una verificaci\u00f3n para validar el valor de epos.bh."}], "lastModified": "2024-12-24T16:11:59.943", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "10282F37-B17F-4974-967E-FCD5ABC9AB8E", "versionEndExcluding": "4.4.276"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C79FFC06-9530-4CD7-B651-01D786CC925E", "versionEndExcluding": "4.9.276", "versionStartIncluding": "4.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FB359B2E-773D-4D52-9915-E07A47ABE72B", "versionEndExcluding": "4.14.240", "versionStartIncluding": "4.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B93AEDB9-C52B-4222-8F9A-882DAD9EF5B2", "versionEndExcluding": "4.19.198", "versionStartIncluding": "4.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "65A8F1FF-5639-455A-8BF4-9FF529240505", "versionEndExcluding": "5.4.133", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "93289127-DFB3-4515-89DD-50521FF8B7FF", "versionEndExcluding": "5.10.51", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "79D13C82-E06F-4A70-A3D1-C09494FBC94D", "versionEndExcluding": "5.12.18", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "853187F6-707A-487B-95C0-621B5211B43C", "versionEndExcluding": "5.13.3", "versionStartIncluding": "5.13"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}