gsd-2021-3490
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
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).
Aliases
Aliases
CVE-2021-3490


To clipboard 

{
   GSD: {
      alias: "CVE-2021-3490",
      description: "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).",
      id: "GSD-2021-3490",
      references: [
         "https://www.suse.com/security/cve/CVE-2021-3490.html",
         "https://ubuntu.com/security/CVE-2021-3490",
         "https://security.archlinux.org/CVE-2021-3490",
         "https://packetstormsecurity.com/files/cve/CVE-2021-3490",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2021-3490",
         ],
         details: "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).",
         id: "GSD-2021-3490",
         modified: "2023-12-13T01:23:34.072371Z",
         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-2021-3490",
            STATE: "PUBLIC",
            TITLE: "Linux kernel eBPF bitwise ops ALU32 bounds tracking",
         },
         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: "Manfred Paul (@_manfp) of the RedRocket CTF team (@redrocket_ctf) 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 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).",
               },
            ],
         },
         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-787 Out-of-bounds Write",
                     },
                  ],
               },
               {
                  description: [
                     {
                        lang: "eng",
                        value: "CWE-20 Improper Input Validation",
                     },
                  ],
               },
            ],
         },
         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-2021-3490 - Linux kernel eBPF bitwise ops ALU32 bounds tracking",
                  refsource: "MLIST",
                  url: "https://www.openwall.com/lists/oss-security/2021/05/11/11",
               },
               {
                  name: "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e",
                  refsource: "MISC",
                  url: "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e",
               },
               {
                  name: "https://www.zerodayinitiative.com/advisories/ZDI-21-606/",
                  refsource: "MISC",
                  url: "https://www.zerodayinitiative.com/advisories/ZDI-21-606/",
               },
               {
                  name: "https://security.netapp.com/advisory/ntap-20210716-0004/",
                  refsource: "CONFIRM",
                  url: "https://security.netapp.com/advisory/ntap-20210716-0004/",
               },
               {
                  name: "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html",
                  refsource: "MISC",
                  url: "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html",
               },
            ],
         },
         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: "5.10",
                        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,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.13:-:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.13:rc2:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*",
                        cpe_name: [],
                        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-2021-3490",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     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).",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-125",
                        },
                        {
                           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://www.zerodayinitiative.com/advisories/ZDI-21-606/",
                     refsource: "MISC",
                     tags: [
                        "Third Party Advisory",
                        "VDB Entry",
                     ],
                     url: "https://www.zerodayinitiative.com/advisories/ZDI-21-606/",
                  },
                  {
                     name: "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e",
                     refsource: "MISC",
                     tags: [
                        "Patch",
                        "Vendor Advisory",
                     ],
                     url: "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e",
                  },
                  {
                     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: "[oss-security] CVE-2021-3490 - Linux kernel eBPF bitwise ops ALU32 bounds tracking",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Patch",
                        "Third Party Advisory",
                     ],
                     url: "https://www.openwall.com/lists/oss-security/2021/05/11/11",
                  },
                  {
                     name: "https://security.netapp.com/advisory/ntap-20210716-0004/",
                     refsource: "CONFIRM",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://security.netapp.com/advisory/ntap-20210716-0004/",
                  },
                  {
                     name: "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html",
                     refsource: "MISC",
                     tags: [
                        "Exploit",
                        "Third Party Advisory",
                        "VDB Entry",
                     ],
                     url: "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html",
                  },
               ],
            },
         },
         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: 7.8,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  version: "3.1",
               },
               exploitabilityScore: 1.8,
               impactScore: 5.9,
            },
         },
         lastModifiedDate: "2021-09-14T14:31Z",
         publishedDate: "2021-06-04T02:15Z",
      },
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




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.