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CNVD-2022-20701

Vulnerability from cnvd - Published: 2022-03-18

Title

Nextcloud输入验证错误漏洞（CNVD-2022-20701）

Description

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Server中存在输入验证错误漏洞，该漏洞源于 DownloadResponse 没有对上传文件名做安全检查，攻击者可利用该漏洞诱导用户下载具有正常文件名的恶意文件。

Severity

中

Patch Name

Nextcloud输入验证错误漏洞（CNVD-2022-20701）的补丁

Patch Description

Nextcloud是德国Nextcloud公司的一套开源的自托管文件同步和共享的通信应用平台。 Nextcloud Server中存在输入验证错误漏洞，该漏洞源于 DownloadResponse 没有对上传文件名做安全检查，攻击者可利用该漏洞诱导用户下载具有正常文件名的恶意文件。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/nextcloud/security-advisories/security/advisories/GHSA-3hjp-26x8-mhf6

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-32679

Impacted products

Name
['Nextcloud Nextcloud Server <19.0.13', 'Nextcloud Nextcloud Server >=20.0.0，<20.0.11', 'Nextcloud Nextcloud Server >=21.0.0，<21.0.3']

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-32679",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-32679"
    }
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  "description": "Nextcloud\u662f\u5fb7\u56fdNextcloud\u516c\u53f8\u7684\u4e00\u5957\u5f00\u6e90\u7684\u81ea\u6258\u7ba1\u6587\u4ef6\u540c\u6b65\u548c\u5171\u4eab\u7684\u901a\u4fe1\u5e94\u7528\u5e73\u53f0\u3002\n\nNextcloud Server\u4e2d\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e DownloadResponse \u6ca1\u6709\u5bf9\u4e0a\u4f20\u6587\u4ef6\u540d\u505a\u5b89\u5168\u68c0\u67e5\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8bf1\u5bfc\u7528\u6237\u4e0b\u8f7d\u5177\u6709\u6b63\u5e38\u6587\u4ef6\u540d\u7684\u6076\u610f\u6587\u4ef6\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/nextcloud/security-advisories/security/advisories/GHSA-3hjp-26x8-mhf6",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2022-20701",
  "openTime": "2022-03-18",
  "patchDescription": "Nextcloud\u662f\u5fb7\u56fdNextcloud\u516c\u53f8\u7684\u4e00\u5957\u5f00\u6e90\u7684\u81ea\u6258\u7ba1\u6587\u4ef6\u540c\u6b65\u548c\u5171\u4eab\u7684\u901a\u4fe1\u5e94\u7528\u5e73\u53f0\u3002\r\n\r\nNextcloud Server\u4e2d\u5b58\u5728\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e DownloadResponse \u6ca1\u6709\u5bf9\u4e0a\u4f20\u6587\u4ef6\u540d\u505a\u5b89\u5168\u68c0\u67e5\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u8bf1\u5bfc\u7528\u6237\u4e0b\u8f7d\u5177\u6709\u6b63\u5e38\u6587\u4ef6\u540d\u7684\u6076\u610f\u6587\u4ef6\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": "Nextcloud\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2022-20701\uff09\u7684\u8865\u4e01",
  "products": {
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      "Nextcloud Nextcloud Server \u003e=20.0.0\uff0c\u003c20.0.11",
      "Nextcloud Nextcloud Server \u003e=21.0.0\uff0c\u003c21.0.3"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-32679",
  "serverity": "\u4e2d",
  "submitTime": "2021-07-14",
  "title": "Nextcloud\u8f93\u5165\u9a8c\u8bc1\u9519\u8bef\u6f0f\u6d1e\uff08CNVD-2022-20701\uff09"
}

CVE-2021-32679 (GCVE-0-2021-32679)

Vulnerability from cvelistv5 – Published: 2021-07-12 12:50 – Updated: 2024-08-03 23:25

Title

Filenames not escaped by default in controllers using DownloadResponse

Summary

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.13, 20.0.11, and 21.0.3, filenames where not escaped by default in controllers using `DownloadResponse`. When a user-supplied filename was passed unsanitized into a `DownloadResponse`, this could be used to trick users into downloading malicious files with a benign file extension. This would show in UI behaviours where Nextcloud applications would display a benign file extension (e.g. JPEG), but the file will actually be downloaded with an executable file extension. The vulnerability is patched in versions 19.0.13, 20.0.11, and 21.0.3. Administrators of Nextcloud instances do not have a workaround available, but developers of Nextcloud apps may manually escape the file name before passing it into `DownloadResponse`.

Severity

3.5 (Low)


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

CWE

CWE-116 - Improper Encoding or Escaping of Output

Assigner

GitHub_M mitre root

References

6 references

URL	Tags
https://github.com/nextcloud/security-advisories/…	x_refsource_CONFIRM
https://github.com/nextcloud/server/pull/27354	x_refsource_MISC
https://hackerone.com/reports/1215263	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202208-17	vendor-advisoryx_refsource_GENTOO

Impacted products

1 product

Vendor	Product	Version
nextcloud	security-advisories	Affected: < 19.0.13 Affected: >= 20.0.0, < 20.0.11 Affected: >= 21.0.0, < 21.0.3

Show details on NVD website

JSON

To clipboard

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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.

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.

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CNVD-2022-20701

CVE-2021-32679 (GCVE-0-2021-32679)

Tags

Sightings

Nomenclature

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