mirror of
https://github.com/fkie-cad/nvd-json-data-feeds.git
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251 lines
8.5 KiB
JSON
251 lines
8.5 KiB
JSON
{
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"id": "CVE-2021-3490",
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"sourceIdentifier": "security@ubuntu.com",
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"published": "2021-06-04T02:15:07.150",
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"lastModified": "2021-09-14T14:31:03.317",
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"vulnStatus": "Analyzed",
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"descriptions": [
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{
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"lang": "en",
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"value": "The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e (\"bpf: Fix alu32 const subreg bound tracking on bitwise operations\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 (\"bpf: Verifier, do explicit ALU32 bounds tracking\") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 (\"bpf:Fix a verifier failure with xor\") ( 5.10-rc1)."
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},
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{
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"lang": "es",
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"value": "El seguimiento de los l\u00edmites de la ALU32 de eBPF para las operaciones por bits (AND, OR y XOR) en el kernel de Linux no actualizaba correctamente los l\u00edmites de 32 bits, lo que pod\u00eda convertirse en lecturas y escrituras fuera de los l\u00edmites en el kernel de Linux y, por tanto, en la ejecuci\u00f3n de c\u00f3digo arbitrario. Este problema fue corregido a trav\u00e9s del commit 049c4e13714e (\"bpf: Fix alu32 const subreg bound tracking on bitwise operations\") (v5.13-rc4) y retrocedido a los kernels estables en v5.12.4, v5.11.21 y v5.10.37. Los problemas de AND/OR fueron introducidos por el commit 3f50f132d840 (\"bpf: Verifier, do explicit ALU32 bounds tracking\") (5.7-rc1) y la variante XOR fue introducida por 2921c90d4718 (\"bpf:Fix a verifier failure with xor\") ( 5.10-rc1)"
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}
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],
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"metrics": {
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"type": "Primary",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"attackVector": "LOCAL",
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"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"scope": "UNCHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"availabilityImpact": "HIGH",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"exploitabilityScore": 1.8,
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"impactScore": 5.9
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},
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"source": "security@ubuntu.com",
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"type": "Secondary",
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"attackVector": "LOCAL",
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"attackComplexity": "HIGH",
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"privilegesRequired": "LOW",
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"userInteraction": "NONE",
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"scope": "CHANGED",
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"confidentialityImpact": "HIGH",
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"integrityImpact": "HIGH",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"version": "2.0",
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"accessVector": "LOCAL",
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"accessComplexity": "LOW",
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"authentication": "NONE",
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"confidentialityImpact": "COMPLETE",
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"baseScore": 7.2
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},
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"description": [
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{
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"lang": "en",
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"value": "CWE-125"
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},
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"value": "CWE-787"
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}
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{
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"value": "CWE-20"
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},
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"value": "CWE-787"
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"references": [
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{
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"url": "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html",
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