github - ghsa-q4c9-gg27-f3pq

ghsa-q4c9-gg27-f3pq

Vulnerability from github

Published

2022-05-24 19:04

Modified

2022-05-24 19:04

Details

The io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc//mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b ("io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c ("io_uring: add IORING_OP_PROVIDE_BUFFERS") (v5.7-rc1).

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{
  "affected": [],
  "aliases": [
    "CVE-2021-3491"
  ],
  "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 io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being usedin mem_rw when reading /proc/\u003cPID\u003e/mem. This could be used to create a heap overflow leading to arbitrary code execution in the kernel. It was addressed via commit d1f82808877b (\"io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers\") (v5.13-rc1) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced in ddf0322db79c (\"io_uring: add IORING_OP_PROVIDE_BUFFERS\") (v5.7-rc1).",
  "id": "GHSA-q4c9-gg27-f3pq",
  "modified": "2022-05-24T19:04:07Z",
  "published": "2022-05-24T19:04:07Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-3491"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db"
    },
    {
      "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/2021/05/11/13"
    },
    {
      "type": "WEB",
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-589"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2021-3491

Vulnerability from cvelistv5

Published

2021-06-04 01:40

Modified

2024-09-16 22:09

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass

References

▼	URL	Tags
	https://ubuntu.com/security/notices/USN-4950-1	vendor-advisory, x_refsource_UBUNTU
	https://ubuntu.com/security/notices/USN-4949-1	vendor-advisory, x_refsource_UBUNTU
	https://www.openwall.com/lists/oss-security/2021/05/11/13	mailing-list, x_refsource_MLIST
	https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db	x_refsource_MISC
	https://www.zerodayinitiative.com/advisories/ZDI-21-589/	x_refsource_MISC
	https://security.netapp.com/advisory/ntap-20210716-0004/	x_refsource_CONFIRM

Impacted products

▼	Vendor	Product
	Linux	Linux kernel

Show details on NVD website

JSON

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              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4950-1"
          },
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          },
          {
            "name": "[oss-security] CVE-2021-3491 - Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT  bypass",
            "tags": [
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          },
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          },
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              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-589/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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        }
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        }
      ],
      "metrics": [
        {
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
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      "providerMetadata": {
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          ],
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          ],
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        }
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      "source": {
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        },
        "affects": {
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            "vendor_data": [
              {
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                      "version": {
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                          },
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                            "version_affected": "\u003c",
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                            "version_value": "v5.12.4"
                          },
                          {
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                            "version_name": "linux-5.11.y",
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                          },
                          {
                            "version_affected": "\u003c",
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                            "version_value": "v5.10.37"
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                            "version_affected": "\u003e=",
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            },
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  "cveMetadata": {
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}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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