Vulnerability-Lookup

CNVD-2021-92540

Vulnerability from cnvd - Published: 2021-11-30

Title

Moodle输入验证错误漏洞（CNVD-2021-92540）

Description

Moodle是一套免费、开源的电子学习软件平台，也称课程管理系统、学习管理系统或虚拟学习环境。 Moodle存在安全漏洞，该漏洞源于软件恢复备份文件的时候存在问题，攻击者可以通过构造错误格式的备份文件，当恢复备份文件时可能导致远程代码执行。

Severity

高

Patch Name

Moodle输入验证错误漏洞（CNVD-2021-92540）的补丁

Patch Description

Moodle是一套免费、开源的电子学习软件平台，也称课程管理系统、学习管理系统或虚拟学习环境。 Moodle存在安全漏洞，该漏洞源于软件恢复备份文件的时候存在问题，攻击者可以通过构造错误格式的备份文件，当恢复备份文件时可能导致远程代码执行。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://moodle.org/mod/forum/discuss.php?d=429095&parent=1726798

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-3943

Impacted products

Name
['Moodle Moodle >=3.10.0，<=3.10.7', 'Moodle Moodle >=3.9.0，<=3.9.10', 'Moodle Moodle >=3.11.0，<=3.11.3']

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-3943"
    }
  },
  "description": "Moodle\u662f\u4e00\u5957\u514d\u8d39\u3001\u5f00\u6e90\u7684\u7535\u5b50\u5b66\u4e60\u8f6f\u4ef6\u5e73\u53f0\uff0c\u4e5f\u79f0\u8bfe\u7a0b\u7ba1\u7406\u7cfb\u7edf\u3001\u5b66\u4e60\u7ba1\u7406\u7cfb\u7edf\u6216\u865a\u62df\u5b66\u4e60\u73af\u5883\u3002\n\nMoodle\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8f6f\u4ef6\u6062\u590d\u5907\u4efd\u6587\u4ef6\u7684\u65f6\u5019\u5b58\u5728\u95ee\u9898\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u9519\u8bef\u683c\u5f0f\u7684\u5907\u4efd\u6587\u4ef6\uff0c\u5f53\u6062\u590d\u5907\u4efd\u6587\u4ef6\u65f6\u53ef\u80fd\u5bfc\u81f4\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\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://moodle.org/mod/forum/discuss.php?d=429095\u0026parent=1726798",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-92540",
  "openTime": "2021-11-30",
  "patchDescription": "Moodle\u662f\u4e00\u5957\u514d\u8d39\u3001\u5f00\u6e90\u7684\u7535\u5b50\u5b66\u4e60\u8f6f\u4ef6\u5e73\u53f0\uff0c\u4e5f\u79f0\u8bfe\u7a0b\u7ba1\u7406\u7cfb\u7edf\u3001\u5b66\u4e60\u7ba1\u7406\u7cfb\u7edf\u6216\u865a\u62df\u5b66\u4e60\u73af\u5883\u3002\r\n\r\nMoodle\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8f6f\u4ef6\u6062\u590d\u5907\u4efd\u6587\u4ef6\u7684\u65f6\u5019\u5b58\u5728\u95ee\u9898\uff0c\u653b\u51fb\u8005\u53ef\u4ee5\u901a\u8fc7\u6784\u9020\u9519\u8bef\u683c\u5f0f\u7684\u5907\u4efd\u6587\u4ef6\uff0c\u5f53\u6062\u590d\u5907\u4efd\u6587\u4ef6\u65f6\u53ef\u80fd\u5bfc\u81f4\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\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": "Moodle\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-92540\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Moodle Moodle \u003e=3.10.0\uff0c\u003c=3.10.7",
      "Moodle Moodle \u003e=3.9.0\uff0c\u003c=3.9.10",
      "Moodle Moodle \u003e=3.11.0\uff0c\u003c=3.11.3"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-3943",
  "serverity": "\u9ad8",
  "submitTime": "2021-11-17",
  "title": "Moodle\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2021-92540\uff09"
}

CVE-2021-3943 (GCVE-0-2021-3943)

Vulnerability from cvelistv5 – Published: 2021-11-22 15:59 – Updated: 2024-08-03 17:09

Summary

A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. A remote code execution risk when restoring backup files was identified.

Severity

No CVSS data available.

CWE

CWE-20

Assigner

fedora redhat root

References

2 references

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2021963	x_refsource_MISC
https://moodle.org/mod/forum/discuss.php?d=429095	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
n/a	moodle	Affected: moodle 3.11.4, moodle 3.10.8 and moodle 3.9.11

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:09:09.615Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2021963"
          },
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              "x_transferred"
            ],
            "url": "https://moodle.org/mod/forum/discuss.php?d=429095"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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        {
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          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
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            }
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              "description": "CWE-20",
              "lang": "en",
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            }
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      ],
      "providerMetadata": {
        "dateUpdated": "2021-11-22T15:59:29.000Z",
        "orgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
        "shortName": "fedora"
      },
      "references": [
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          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2021963"
        },
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          "tags": [
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          ],
          "url": "https://moodle.org/mod/forum/discuss.php?d=429095"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "patrick@puiterwijk.org",
          "ID": "CVE-2021-3943",
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        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "moodle",
                      "version": {
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                          {
                            "version_value": "moodle 3.11.4, moodle 3.10.8 and moodle 3.9.11"
                          }
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            },
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    "dateReserved": "2021-11-10T00:00:00.000Z",
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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.