Vulnerability-Lookup

CNVD-2021-17248

Vulnerability from cnvd - Published: 2021-03-13

Title

ONLYOFFICE Document Server文件扩展名处理漏洞（CNVD-2021-17248）

Description

ONLYOFFICE Document Server是一款免费协作式在线办公套件，包括用于文本、电子表格和演示文稿的查看器和编辑器。 ONLYOFFICE DocumentServer [core]模块存在文件扩展名处理漏洞，攻击者可通过请求将特制文件从PPTT转换为PPTX格式利用该漏洞实现远程代码执行。

Severity

中

Patch Name

ONLYOFFICE Document Server文件扩展名处理漏洞（CNVD-2021-17248）的补丁

Patch Description

ONLYOFFICE Document Server是一款免费协作式在线办公套件，包括用于文本、电子表格和演示文稿的查看器和编辑器。 ONLYOFFICE DocumentServer [core]模块存在文件扩展名处理漏洞，攻击者可通过请求将特制文件从PPTT转换为PPTX格式利用该漏洞实现远程代码执行。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

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/ONLYOFFICE/DocumentServer

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-25831

Impacted products

Name
Ascensio System ONLYOFFICE Document Server >=4.0.0-9，<=5.6.3

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-25831",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-25831"
    }
  },
  "description": "ONLYOFFICE Document Server\u662f\u4e00\u6b3e\u514d\u8d39\u534f\u4f5c\u5f0f\u5728\u7ebf\u529e\u516c\u5957\u4ef6\uff0c\u5305\u62ec\u7528\u4e8e\u6587\u672c\u3001\u7535\u5b50\u8868\u683c\u548c\u6f14\u793a\u6587\u7a3f\u7684\u67e5\u770b\u5668\u548c\u7f16\u8f91\u5668\u3002\n\nONLYOFFICE DocumentServer [core]\u6a21\u5757\u5b58\u5728\u6587\u4ef6\u6269\u5c55\u540d\u5904\u7406\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u8bf7\u6c42\u5c06\u7279\u5236\u6587\u4ef6\u4ecePPTT\u8f6c\u6362\u4e3aPPTX\u683c\u5f0f\u5229\u7528\u8be5\u6f0f\u6d1e\u5b9e\u73b0\u8fdc\u7a0b\u4ee3\u7801\u6267\u884c\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://github.com/ONLYOFFICE/DocumentServer",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-17248",
  "openTime": "2021-03-13",
  "patchDescription": "ONLYOFFICE Document Server\u662f\u4e00\u6b3e\u514d\u8d39\u534f\u4f5c\u5f0f\u5728\u7ebf\u529e\u516c\u5957\u4ef6\uff0c\u5305\u62ec\u7528\u4e8e\u6587\u672c\u3001\u7535\u5b50\u8868\u683c\u548c\u6f14\u793a\u6587\u7a3f\u7684\u67e5\u770b\u5668\u548c\u7f16\u8f91\u5668\u3002\r\n\r\nONLYOFFICE DocumentServer [core]\u6a21\u5757\u5b58\u5728\u6587\u4ef6\u6269\u5c55\u540d\u5904\u7406\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u8bf7\u6c42\u5c06\u7279\u5236\u6587\u4ef6\u4ecePPTT\u8f6c\u6362\u4e3aPPTX\u683c\u5f0f\u5229\u7528\u8be5\u6f0f\u6d1e\u5b9e\u73b0\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": "ONLYOFFICE Document Server\u6587\u4ef6\u6269\u5c55\u540d\u5904\u7406\u6f0f\u6d1e\uff08CNVD-2021-17248\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Ascensio System ONLYOFFICE Document Server \u003e=4.0.0-9\uff0c\u003c=5.6.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-25831",
  "serverity": "\u4e2d",
  "submitTime": "2021-03-02",
  "title": "ONLYOFFICE Document Server\u6587\u4ef6\u6269\u5c55\u540d\u5904\u7406\u6f0f\u6d1e\uff08CNVD-2021-17248\uff09"
}

CVE-2021-25831 (GCVE-0-2021-25831)

Vulnerability from cvelistv5 – Published: 2021-03-01 15:08 – Updated: 2024-08-03 20:11

Summary

A file extension handling issue was found in [core] module of ONLYOFFICE DocumentServer v4.0.0-9-v5.6.3. An attacker must request the conversion of the crafted file from PPTT into PPTX format. Using the chain of two other bugs related to improper string handling, a remote attacker can obtain remote code execution on DocumentServer.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

6 references

URL	Tags
https://github.com/ONLYOFFICE/DocumentServer	x_refsource_MISC
https://github.com/ONLYOFFICE/core	x_refsource_MISC
https://github.com/ONLYOFFICE/core/blob/v5.6.4.13…	x_refsource_MISC
https://github.com/ONLYOFFICE/core/blob/v5.6.4.13…	x_refsource_MISC
https://github.com/ONLYOFFICE/core/blob/v5.6.4.13…	x_refsource_MISC
https://github.com/merrychap/poc_exploits/tree/ma…	x_refsource_MISC

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JSON

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          "dateUpdated": "2024-08-03T20:11:28.475Z",
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            "url": "https://github.com/ONLYOFFICE/DocumentServer"
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            "url": "https://github.com/ONLYOFFICE/core"
          },
          {
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            "url": "https://github.com/ONLYOFFICE/core/blob/v5.6.4.13/ASCOfficePPTXFile/Editor/BinaryFileReaderWriter.cpp#L241"
          },
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            "tags": [
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            "url": "https://github.com/ONLYOFFICE/core/blob/v5.6.4.13/ASCOfficePPTXFile/Editor/BinaryFileReaderWriter.cpp#L1918"
          },
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            "url": "https://github.com/ONLYOFFICE/core/blob/v5.6.4.13/ASCOfficePPTXFile/PPTXFormat/Logic/Fills/BlipFill.cpp#L328"
          },
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            ],
            "url": "https://github.com/merrychap/poc_exploits/tree/master/ONLYOFFICE/CVE-2021-25831"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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          "versions": [
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          "url": "https://github.com/ONLYOFFICE/core/blob/v5.6.4.13/ASCOfficePPTXFile/Editor/BinaryFileReaderWriter.cpp#L241"
        },
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        },
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            },
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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.
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CNVD-2021-17248

CVE-2021-25831 (GCVE-0-2021-25831)

Tags

Sightings

Nomenclature

Related by attack behaviour