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CNVD-2017-00488

Vulnerability from cnvd - Published: 2017-01-17
VLAI
Title
libgit2安全绕过漏洞（CNVD-2017-00488）
Description
libgit2是一个可移植、使用C语言实现的Git核心开发包。 libgit20.25版本和0.24版本中的badssl.c文件存在安全绕过漏洞。攻击者可利用该漏洞绕过安全限制，并执行未授权的操作。
Severity
中
Patch Name
libgit2安全绕过漏洞（CNVD-2017-00488）的补丁
Patch Description
libgit2是一个可移植、使用C语言实现的Git核心开发包。 libgit20.25版本和0.24版本中的badssl.c文件存在安全绕过漏洞。攻击者可利用该漏洞绕过安全限制，并执行未授权的操作。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/libgit2/libgit2

Reference
http://www.securityfocus.com/bid/95357
Impacted products
Name
['libgit2 libgit2', 'libgit2 libgit2 0.24', 'libgit2 libgit2 0.25']
Show details on source website
To clipboard 

{
  "bids": {
    "bid": {
      "bidNumber": "95357"
    }
  },
  "cves": {
    "cve": {
      "cveNumber": "CVE-2017-5339"
    }
  },
  "description": "libgit2\u662f\u4e00\u4e2a\u53ef\u79fb\u690d\u3001\u4f7f\u7528C\u8bed\u8a00\u5b9e\u73b0\u7684Git\u6838\u5fc3\u5f00\u53d1\u5305\u3002\r\n\r\nlibgit20.25\u7248\u672c\u548c0.24\u7248\u672c\u4e2d\u7684badssl.c\u6587\u4ef6\u5b58\u5728\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u5b89\u5168\u9650\u5236\uff0c\u5e76\u6267\u884c\u672a\u6388\u6743\u7684\u64cd\u4f5c\u3002",
  "discovererName": "Andreas Stieger",
  "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/libgit2/libgit2",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2017-00488",
  "openTime": "2017-01-17",
  "patchDescription": "libgit2\u662f\u4e00\u4e2a\u53ef\u79fb\u690d\u3001\u4f7f\u7528C\u8bed\u8a00\u5b9e\u73b0\u7684Git\u6838\u5fc3\u5f00\u53d1\u5305\u3002\r\n\r\nlibgit20.25\u7248\u672c\u548c0.24\u7248\u672c\u4e2d\u7684badssl.c\u6587\u4ef6\u5b58\u5728\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u5b89\u5168\u9650\u5236\uff0c\u5e76\u6267\u884c\u672a\u6388\u6743\u7684\u64cd\u4f5c\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": "libgit2\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\uff08CNVD-2017-00488\uff09\u7684\u8865\u4e01",
  "products": {
    "product": [
      "libgit2 libgit2",
      "libgit2 libgit2 0.24",
      "libgit2 libgit2 0.25"
    ]
  },
  "referenceLink": "http://www.securityfocus.com/bid/95357",
  "serverity": "\u4e2d",
  "submitTime": "2017-01-13",
  "title": "libgit2\u5b89\u5168\u7ed5\u8fc7\u6f0f\u6d1e\uff08CNVD-2017-00488\uff09"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.