gsd-2021-33200
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
Aliases
Aliases
CVE-2021-33200


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-33200",
    "description": "kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux-\u003ealu_limit.",
    "id": "GSD-2021-33200",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-33200.html",
      "https://access.redhat.com/errata/RHSA-2021:4356",
      "https://access.redhat.com/errata/RHSA-2021:4140",
      "https://ubuntu.com/security/CVE-2021-33200",
      "https://advisories.mageia.org/CVE-2021-33200.html",
      "https://security.archlinux.org/CVE-2021-33200",
      "https://alas.aws.amazon.com/cve/html/CVE-2021-33200.html",
      "https://linux.oracle.com/cve/CVE-2021-33200.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
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        "CVE-2021-33200"
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      "id": "GSD-2021-33200",
      "modified": "2023-12-13T01:23:18.636061Z",
      "schema_version": "1.4.0"
    }
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            "value": "El archivo kernel/bpf/verifier.c en el kernel de Linux versiones hasta 5.12.7, aplica l\u00edmites incorrectos para operaciones aritm\u00e9ticas de puntero, tambi\u00e9n se conoce como CID-bb01a1bba579. Esto puede ser abusado para llevar a cabo lecturas y escrituras fuera de l\u00edmites en la memoria del kernel, conllevando a una escalada local de privilegios a root.\u0026#xa0;En particular, se presenta un caso de esquina donde el off reg causa un cambio de direcci\u00f3n de enmascaramiento, que luego resulta en un aux-)alu_limit final incorrecto"
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        "id": "CVE-2021-33200",
        "lastModified": "2024-03-25T01:15:51.037",
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}


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