CNVD-2020-41756

Vulnerability from cnvd - Published: 2020-07-22
VLAI
Title
Python无限循环漏洞
Description
Python是一种广泛使用的高级编程语言，属于通用型编程语言。 Python 3.8.3及更早版本中的Lib/tarfile.py存在无限循环漏洞。该漏洞源于_proc_pax缺少header验证。攻击者可通过特制TAR文件利用该漏洞导致拒绝服务。
Severity
中
Patch Name
Python无限循环漏洞的补丁
Patch Description
Python是一种广泛使用的高级编程语言，属于通用型编程语言。 Python 3.8.3及更早版本中的Lib/tarfile.py存在无限循环漏洞。该漏洞源于_proc_pax缺少header验证。攻击者可通过特制TAR文件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

厂商已发布了漏洞修复程序，请及时关注更新： https://github.com/python/cpython/pull/21454

Reference
https://nvd.nist.gov/vuln/detail/CVE-2019-20907
Impacted products
Name
python Python <=3.8.3
Show details on source website
To clipboard 

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2019-20907",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2019-20907"
    }
  },
  "description": "Python\u662f\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00\uff0c\u5c5e\u4e8e\u901a\u7528\u578b\u7f16\u7a0b\u8bed\u8a00\u3002\n\nPython 3.8.3\u53ca\u66f4\u65e9\u7248\u672c\u4e2d\u7684Lib/tarfile.py\u5b58\u5728\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e_proc_pax\u7f3a\u5c11header\u9a8c\u8bc1\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7279\u5236TAR\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u62d2\u7edd\u670d\u52a1\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/python/cpython/pull/21454",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-41756",
  "openTime": "2020-07-22",
  "patchDescription": "Python\u662f\u4e00\u79cd\u5e7f\u6cdb\u4f7f\u7528\u7684\u9ad8\u7ea7\u7f16\u7a0b\u8bed\u8a00\uff0c\u5c5e\u4e8e\u901a\u7528\u578b\u7f16\u7a0b\u8bed\u8a00\u3002\r\n\r\nPython 3.8.3\u53ca\u66f4\u65e9\u7248\u672c\u4e2d\u7684Lib/tarfile.py\u5b58\u5728\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u6e90\u4e8e_proc_pax\u7f3a\u5c11header\u9a8c\u8bc1\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7279\u5236TAR\u6587\u4ef6\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": "Python\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "python Python \u003c=3.8.3"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2019-20907",
  "serverity": "\u4e2d",
  "submitTime": "2020-07-14",
  "title": "Python\u65e0\u9650\u5faa\u73af\u6f0f\u6d1e"
}



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Sightings

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Nomenclature

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.



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