Vulnerability-Lookup

CNVD-2021-54395

Vulnerability from cnvd - Published: 2021-07-23

Title

Linux kernel缓冲区溢出漏洞（CNVD-2021-54395）

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞。该漏洞源于发现按位操作（AND，OR和XOR）的eBPF ALU32边界跟踪不会更新32位边界。目前没有详细的漏洞细节提供。

Severity

高

Patch Name

Linux kernel缓冲区溢出漏洞（CNVD-2021-54395）的补丁

Patch Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞。该漏洞源于发现按位操作（AND，OR和XOR）的eBPF ALU32边界跟踪不会更新32位边界。目前没有详细的漏洞细节提供。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已发布升级补丁以修复漏洞，补丁获取链接： https://ubuntu.com/security/CVE-2021-3490

Reference

https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e

Impacted products

Name
Linux Kernel

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-3490",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-3490"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u53d1\u73b0\u6309\u4f4d\u64cd\u4f5c\uff08AND\uff0cOR\u548cXOR\uff09\u7684eBPF ALU32\u8fb9\u754c\u8ddf\u8e2a\u4e0d\u4f1a\u66f4\u65b032\u4f4d\u8fb9\u754c\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttps://ubuntu.com/security/CVE-2021-3490",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-54395",
  "openTime": "2021-07-23",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u53d1\u73b0\u6309\u4f4d\u64cd\u4f5c\uff08AND\uff0cOR\u548cXOR\uff09\u7684eBPF ALU32\u8fb9\u754c\u8ddf\u8e2a\u4e0d\u4f1a\u66f4\u65b032\u4f4d\u8fb9\u754c\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-54395\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel"
  },
  "referenceLink": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e",
  "serverity": "\u9ad8",
  "submitTime": "2021-07-16",
  "title": "Linux kernel\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-54395\uff09"
}

CVE-2021-3490 (GCVE-0-2021-3490)

Vulnerability from cvelistv5 – Published: 2021-06-04 01:40 – Updated: 2024-09-16 22:29

Title

Linux kernel eBPF bitwise ops ALU32 bounds tracking

Summary

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).

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CWE

CWE-787 - Out-of-bounds Write
CWE-20 - Improper Input Validation

Assigner

canonical mitre root

References

7 references

URL	Tags
https://ubuntu.com/security/notices/USN-4950-1	vendor-advisoryx_refsource_UBUNTU
https://ubuntu.com/security/notices/USN-4949-1	vendor-advisoryx_refsource_UBUNTU
https://www.openwall.com/lists/oss-security/2021/…	mailing-listx_refsource_MLIST
https://git.kernel.org/pub/scm/linux/kernel/git/b…	x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-…	x_refsource_MISC
https://security.netapp.com/advisory/ntap-2021071…	x_refsource_CONFIRM
http://packetstormsecurity.com/files/164015/Linux…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Linux	Linux kernel	Affected: trunk , < v5.13-rc4 (custom) Affected: linux-5.12.y , < v5.12.4 (custom) Affected: linux-5.11.y , < v5.11.21 (custom) Affected: linux-5.10.y , < v5.10.37 (custom) Affected: v5.7-rc1 , < 5.7* (custom)

Date Public

2021-05-11 00:00

Credits

Manfred Paul (@_manfp) of the RedRocket CTF team (@redrocket_ctf) working with Trend Micro's Zero Day Initiative

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T16:53:17.879Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4950-1"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "https://ubuntu.com/security/notices/USN-4949-1"
          },
          {
            "name": "[oss-security] CVE-2021-3490 - Linux kernel eBPF bitwise ops ALU32 bounds tracking",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/05/11/11"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-606/"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Linux kernel",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "v5.13-rc4",
              "status": "affected",
              "version": "trunk",
              "versionType": "custom"
            },
            {
              "lessThan": "v5.12.4",
              "status": "affected",
              "version": "linux-5.12.y",
              "versionType": "custom"
            },
            {
              "lessThan": "v5.11.21",
              "status": "affected",
              "version": "linux-5.11.y",
              "versionType": "custom"
            },
            {
              "lessThan": "v5.10.37",
              "status": "affected",
              "version": "linux-5.10.y",
              "versionType": "custom"
            },
            {
              "lessThan": "5.7*",
              "status": "affected",
              "version": "v5.7-rc1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Manfred Paul (@_manfp) of the RedRocket CTF team (@redrocket_ctf) working with Trend Micro\u0027s Zero Day Initiative"
        }
      ],
      "datePublic": "2021-05-11T00:00:00.000Z",
      "descriptions": [
        {
          "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)."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "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"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "CWE-787 Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20 Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-01T17:06:42.000Z",
        "orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
        "shortName": "canonical"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "https://ubuntu.com/security/notices/USN-4950-1"
        },
        {
          "tags": [
            "vendor-advisory",
            "x_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",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2021/05/11/11"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e13714ecbca567b4d5f6d563f05d431c80e"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-606/"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210716-0004/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/164015/Linux-eBPF-ALU32-32-bit-Invalid-Bounds-Tracking-Local-Privilege-Escalation.html"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Linux kernel eBPF bitwise ops ALU32 bounds tracking",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "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": "\u003c",
                            "version_name": "trunk",
                            "version_value": "v5.13-rc4"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "linux-5.12.y",
                            "version_value": "v5.12.4"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "linux-5.11.y",
                            "version_value": "v5.11.21"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "linux-5.10.y",
                            "version_value": "v5.10.37"
                          },
                          {
                            "version_affected": "\u003e=",
                            "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\u0027s 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"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc",
    "assignerShortName": "canonical",
    "cveId": "CVE-2021-3490",
    "datePublished": "2021-06-04T01:40:20.129Z",
    "dateReserved": "2021-04-09T00:00:00.000Z",
    "dateUpdated": "2024-09-16T22:29:57.625Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CNVD-2021-54395

CVE-2021-3490 (GCVE-0-2021-3490)

Tags

Sightings

Nomenclature

Related by attack behaviour