ghsa-45wv-rq2g-2vvj
Vulnerability from github
Published
2022-05-24 19:04
Modified
2022-05-24 19:04
Details

The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee ("bpf, ringbuf: Deny reserve of buffers larger than ringbuf") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 ("bpf: Implement BPF ring buffer and verifier support for it") (v5.8-rc1).

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{
  "affected": [],
  "aliases": [
    "CVE-2021-3489"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2021-06-04T02:15:00Z",
    "severity": "HIGH"
  },
  "details": "The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (\"bpf, ringbuf: Deny reserve of buffers larger than ringbuf\") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (\"bpf: Implement BPF ring buffer and verifier support for it\") (v5.8-rc1).",
  "id": "GHSA-45wv-rq2g-2vvj",
  "modified": "2022-05-24T19:04:07Z",
  "published": "2022-05-24T19:04:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3489"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=4b81ccebaeee885ab1aa1438133f2991e3a2b6ea"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20210716-0004"
    },
    {
      "type": "WEB",
      "url": "https://ubuntu.com/security/notices/USN-4949-1"
    },
    {
      "type": "WEB",
      "url": "https://ubuntu.com/security/notices/USN-4950-1"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2021/05/11/10"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-590"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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