gsd-2021-3491
Vulnerability from gsd
Modified
2023-12-13 01:23
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/<PID>/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).
Aliases
Aliases
CVE-2021-3491


To clipboard 

{
   GSD: {
      alias: "CVE-2021-3491",
      description: "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/<PID>/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: "GSD-2021-3491",
      references: [
         "https://www.suse.com/security/cve/CVE-2021-3491.html",
         "https://ubuntu.com/security/CVE-2021-3491",
         "https://advisories.mageia.org/CVE-2021-3491.html",
         "https://security.archlinux.org/CVE-2021-3491",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2021-3491",
         ],
         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/<PID>/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: "GSD-2021-3491",
         modified: "2023-12-13T01:23:34.013680Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "security@ubuntu.com",
            DATE_PUBLIC: "2021-05-11 17:00:00 +0000",
            ID: "CVE-2021-3491",
            STATE: "PUBLIC",
            TITLE: "Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT  bypass",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "Linux kernel",
                              version: {
                                 version_data: [
                                    {
                                       version_affected: "<",
                                       version_name: "trunk",
                                       version_value: "v5.13-rc4",
                                    },
                                    {
                                       version_affected: "<",
                                       version_name: "linux-5.12.y",
                                       version_value: "v5.12.4",
                                    },
                                    {
                                       version_affected: "<",
                                       version_name: "linux-5.11.y",
                                       version_value: "v5.11.21",
                                    },
                                    {
                                       version_affected: "<",
                                       version_name: "linux-5.10.y",
                                       version_value: "v5.10.37",
                                    },
                                    {
                                       version_affected: ">=",
                                       version_name: "5.7",
                                       version_value: "v5.7-rc1",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "Linux",
                  },
               ],
            },
         },
         credit: [
            {
               lang: "eng",
               value: "Billy Jheng Bing-Jhong (@st424204) of STAR Labs working with Trend Micro's Zero Day Initiative",
            },
         ],
         data_format: "MITRE",
         data_type: "CVE",
         data_version: "4.0",
         description: {
            description_data: [
               {
                  lang: "eng",
                  value: "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/<PID>/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).",
               },
            ],
         },
         generator: {
            engine: "Vulnogram 0.0.9",
         },
         impact: {
            cvss: {
               attackComplexity: "HIGH",
               attackVector: "LOCAL",
               availabilityImpact: "HIGH",
               baseScore: 7.8,
               baseSeverity: "HIGH",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "LOW",
               scope: "CHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
               version: "3.1",
            },
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "CWE-131 Incorrect Calculation of Buffer Size",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://ubuntu.com/security/notices/USN-4950-1",
                  refsource: "UBUNTU",
                  url: "https://ubuntu.com/security/notices/USN-4950-1",
               },
               {
                  name: "https://ubuntu.com/security/notices/USN-4949-1",
                  refsource: "UBUNTU",
                  url: "https://ubuntu.com/security/notices/USN-4949-1",
               },
               {
                  name: "[oss-security] CVE-2021-3491 - Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT  bypass",
                  refsource: "MLIST",
                  url: "https://www.openwall.com/lists/oss-security/2021/05/11/13",
               },
               {
                  name: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db",
                  refsource: "MISC",
                  url: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db",
               },
               {
                  name: "https://www.zerodayinitiative.com/advisories/ZDI-21-589/",
                  refsource: "MISC",
                  url: "https://www.zerodayinitiative.com/advisories/ZDI-21-589/",
               },
               {
                  name: "https://security.netapp.com/advisory/ntap-20210716-0004/",
                  refsource: "CONFIRM",
                  url: "https://security.netapp.com/advisory/ntap-20210716-0004/",
               },
            ],
         },
         source: {
            discovery: "EXTERNAL",
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "5.10.37",
                        versionStartIncluding: "5.7",
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "5.11.21",
                        versionStartIncluding: "5.11",
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "5.12.4",
                        versionStartIncluding: "5.12",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:21.04:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "security@ubuntu.com",
               ID: "CVE-2021-3491",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "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/<PID>/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).",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-787",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://ubuntu.com/security/notices/USN-4949-1",
                     refsource: "UBUNTU",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://ubuntu.com/security/notices/USN-4949-1",
                  },
                  {
                     name: "https://ubuntu.com/security/notices/USN-4950-1",
                     refsource: "UBUNTU",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://ubuntu.com/security/notices/USN-4950-1",
                  },
                  {
                     name: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db",
                     refsource: "MISC",
                     tags: [
                        "Patch",
                        "Vendor Advisory",
                     ],
                     url: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db",
                  },
                  {
                     name: "https://www.zerodayinitiative.com/advisories/ZDI-21-589/",
                     refsource: "MISC",
                     tags: [
                        "Third Party Advisory",
                        "VDB Entry",
                     ],
                     url: "https://www.zerodayinitiative.com/advisories/ZDI-21-589/",
                  },
                  {
                     name: "[oss-security] CVE-2021-3491 - Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT  bypass",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Patch",
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                     ],
                     url: "https://www.openwall.com/lists/oss-security/2021/05/11/13",
                  },
                  {
                     name: "https://security.netapp.com/advisory/ntap-20210716-0004/",
                     refsource: "CONFIRM",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://security.netapp.com/advisory/ntap-20210716-0004/",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "COMPLETE",
                  baseScore: 7.2,
                  confidentialityImpact: "COMPLETE",
                  integrityImpact: "COMPLETE",
                  vectorString: "AV:L/AC:L/Au:N/C:C/I:C/A:C",
                  version: "2.0",
               },
               exploitabilityScore: 3.9,
               impactScore: 10,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "HIGH",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "LOW",
                  attackVector: "LOCAL",
                  availabilityImpact: "HIGH",
                  baseScore: 8.8,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "LOW",
                  scope: "CHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
                  version: "3.1",
               },
               exploitabilityScore: 2,
               impactScore: 6,
            },
         },
         lastModifiedDate: "2021-09-14T14:31Z",
         publishedDate: "2021-06-04T02:15Z",
      },
   },
}


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