Vulnerability-Lookup

CNVD-2021-03021

Vulnerability from cnvd - Published: 2021-01-15

Title

Fluent Bit缓冲区溢出漏洞

Description

Fluent Bit是一款使用C语言编写的开源日志处理和分析系统。 Fluent Bit 1.6.4版本存在缓冲区溢出漏洞，该漏洞源于flb_gzip_compress in flb_gzip.c 具有越界写操作，因为它未能使用最大gzip数据大小扩展的正确计算方法。目前没有详细的漏洞细节提供。

Severity

中

Patch Name

Fluent Bit缓冲区溢出漏洞的补丁

Patch Description

Fluent Bit是一款使用C语言编写的开源日志处理和分析系统。 Fluent Bit 1.6.4版本存在缓冲区溢出漏洞，该漏洞源于flb_gzip_compress in flb_gzip.c 具有越界写操作，因为它未能使用最大gzip数据大小扩展的正确计算方法。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://github.com/FFmpeg/FFmpeg/commit/27a99e2c7d450fef15594671eef4465c8a166bd7

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-35963

Impacted products

Name
Fluent Bit Fluent Bit 1.6.4

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-35963",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-35963"
    }
  },
  "description": "Fluent Bit\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684\u5f00\u6e90\u65e5\u5fd7\u5904\u7406\u548c\u5206\u6790\u7cfb\u7edf\u3002\n\nFluent Bit 1.6.4\u7248\u672c\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eflb_gzip_compress in flb_gzip.c \u5177\u6709\u8d8a\u754c\u5199\u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b83\u672a\u80fd\u4f7f\u7528\u6700\u5927gzip\u6570\u636e\u5927\u5c0f\u6269\u5c55\u7684\u6b63\u786e\u8ba1\u7b97\u65b9\u6cd5\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://github.com/FFmpeg/FFmpeg/commit/27a99e2c7d450fef15594671eef4465c8a166bd7",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-03021",
  "openTime": "2021-01-15",
  "patchDescription": "Fluent Bit\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684\u5f00\u6e90\u65e5\u5fd7\u5904\u7406\u548c\u5206\u6790\u7cfb\u7edf\u3002\r\n\r\nFluent Bit 1.6.4\u7248\u672c\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8eflb_gzip_compress in flb_gzip.c \u5177\u6709\u8d8a\u754c\u5199\u64cd\u4f5c\uff0c\u56e0\u4e3a\u5b83\u672a\u80fd\u4f7f\u7528\u6700\u5927gzip\u6570\u636e\u5927\u5c0f\u6269\u5c55\u7684\u6b63\u786e\u8ba1\u7b97\u65b9\u6cd5\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": "Fluent Bit\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Fluent Bit Fluent Bit 1.6.4"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-35963",
  "serverity": "\u4e2d",
  "submitTime": "2021-01-08",
  "title": "Fluent Bit\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}

CVE-2020-35963 (GCVE-0-2020-35963)

Vulnerability from cvelistv5 – Published: 2021-01-03 18:15 – Updated: 2024-08-04 17:16

Summary

flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://bugs.chromium.org/p/oss-fuzz/issues/detai…	x_refsource_MISC
https://fluentbit.io/announcements/v1.6.4/	x_refsource_MISC
https://github.com/fluent/fluent-bit/commit/cadff…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
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        "providerMetadata": {
          "dateUpdated": "2024-08-04T17:16:13.850Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://fluentbit.io/announcements/v1.6.4/"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "vendor": "n/a",
          "versions": [
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      ],
      "descriptions": [
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          "value": "flb_gzip_compress in flb_gzip.c in Fluent Bit before 1.6.4 has an out-of-bounds write because it does not use the correct calculation of the maximum gzip data-size expansion."
        }
      ],
      "problemTypes": [
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          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
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      ],
      "providerMetadata": {
        "dateUpdated": "2021-01-03T18:15:48.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://fluentbit.io/announcements/v1.6.4/"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2020-35963",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
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        "problemtype": {
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                  "value": "n/a"
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        "references": {
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              "url": "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27261"
            },
            {
              "name": "https://fluentbit.io/announcements/v1.6.4/",
              "refsource": "MISC",
              "url": "https://fluentbit.io/announcements/v1.6.4/"
            },
            {
              "name": "https://github.com/fluent/fluent-bit/commit/cadff53c093210404aed01c4cf586adb8caa07af",
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  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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    "dateReserved": "2021-01-03T00:00:00.000Z",
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    "state": "PUBLISHED"
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}

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.

Detection rules are retrieved from Rulezet.

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.