CVE-2021-47604

{"id": "CVE-2021-47604", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "published": "2024-06-19T15:15:54.973", "references": [{"url": "https://git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: check that offset is within bounds in get_config()\n\nThis condition checks \"len\" but it does not check \"offset\" and that\ncould result in an out of bounds read if \"offset > dev->config_size\".\nThe problem is that since both variables are unsigned the\n\"dev->config_size - offset\" subtraction would result in a very high\nunsigned value.\n\nI think these checks might not be necessary because \"len\" and \"offset\"\nare supposed to already have been validated using the\nvhost_vdpa_config_validate() function. But I do not know the code\nperfectly, and I like to be safe."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: vduse: verifique que el desplazamiento est\u00e9 dentro de los l\u00edmites en get_config() Esta condici\u00f3n verifica \"len\" pero no verifica \"desplazamiento\" y eso podr\u00eda resultar en una lectura fuera de los l\u00edmites si \" desplazamiento > dev->config_size\". El problema es que, dado que ambas variables no est\u00e1n firmadas, la resta \"dev->config_size - offset\" dar\u00eda como resultado un valor sin firmar muy alto. Creo que estas comprobaciones podr\u00edan no ser necesarias porque se supone que \"len\" y \"offset\" ya se han validado mediante la funci\u00f3n vhost_vdpa_config_validate(). Pero no conozco el c\u00f3digo a la perfecci\u00f3n y me gusta estar seguro."}], "lastModified": "2024-08-27T16:14:27.793", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7A70FD7B-2EDC-4C3B-ADE0-880AA759CDD7", "versionEndExcluding": "5.15.11", "versionStartIncluding": "5.15"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}