Vulnerability-Lookup

CNVD-2021-73175

Vulnerability from cnvd - Published: 2021-09-25

Title

SWFTools空指针解引用漏洞（CNVD-2021-73175）

Description

SWFTools是用于创建和操作SWF文件的开源软件工具套件。 SWFTools swftext.c中的swf_FontExtract_DefineFontInfo()函数存在空指针解引用漏洞。攻击者可利用该漏洞导致拒绝服务。

Severity

中

Patch Name

SWFTools空指针解引用漏洞（CNVD-2021-73175）的补丁

Patch Description

SWFTools是用于创建和操作SWF文件的开源软件工具套件。 SWFTools swftext.c中的swf_FontExtract_DefineFontInfo()函数存在空指针解引用漏洞。攻击者可利用该漏洞导致拒绝服务。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

厂商尚未提供漏洞修复方案，请关注厂商主页更新： https://github.com/matthiaskramm/swftools

Reference

https://nvd.nist.gov/vuln/detail/CVE-2021-39593

Impacted products

Name
SWFTools SWFTools 20200710

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-39593",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-39593"
    }
  },
  "description": "SWFTools\u662f\u7528\u4e8e\u521b\u5efa\u548c\u64cd\u4f5cSWF\u6587\u4ef6\u7684\u5f00\u6e90\u8f6f\u4ef6\u5de5\u5177\u5957\u4ef6\u3002\n\nSWFTools swftext.c\u4e2d\u7684swf_FontExtract_DefineFontInfo()\u51fd\u6570\u5b58\u5728\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\u3002",
  "formalWay": "\u5382\u5546\u5c1a\u672a\u63d0\u4f9b\u6f0f\u6d1e\u4fee\u590d\u65b9\u6848\uff0c\u8bf7\u5173\u6ce8\u5382\u5546\u4e3b\u9875\u66f4\u65b0\uff1a\r\nhttps://github.com/matthiaskramm/swftools",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-73175",
  "openTime": "2021-09-25",
  "patchDescription": "SWFTools\u662f\u7528\u4e8e\u521b\u5efa\u548c\u64cd\u4f5cSWF\u6587\u4ef6\u7684\u5f00\u6e90\u8f6f\u4ef6\u5de5\u5177\u5957\u4ef6\u3002\r\n\r\nSWFTools swftext.c\u4e2d\u7684swf_FontExtract_DefineFontInfo()\u51fd\u6570\u5b58\u5728\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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": "SWFTools\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\uff08CNVD-2021-73175\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "SWFTools SWFTools 20200710"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-39593",
  "serverity": "\u4e2d",
  "submitTime": "2021-09-22",
  "title": "SWFTools\u7a7a\u6307\u9488\u89e3\u5f15\u7528\u6f0f\u6d1e\uff08CNVD-2021-73175\uff09"
}

CVE-2021-39593 (GCVE-0-2021-39593)

Vulnerability from cvelistv5 – Published: 2021-09-20 15:27 – Updated: 2024-08-04 02:13

Summary

An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function swf_FontExtract_DefineFontInfo() located in swftext.c. It allows an attacker to cause Denial of Service.

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

1 reference

URL	Tags
https://github.com/matthiaskramm/swftools/issues/139	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

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          "dateUpdated": "2024-08-04T02:13:37.330Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/matthiaskramm/swftools/issues/139"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
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          "vendor": "n/a",
          "versions": [
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        }
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        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/matthiaskramm/swftools/issues/139"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-39593",
          "STATE": "PUBLIC"
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                      "version": {
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                            "version_value": "n/a"
                          }
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                      }
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  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
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  },
  "dataType": "CVE_RECORD",
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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.