CNVD-2020-51512

Vulnerability from cnvd - Published: 2020-09-11
VLAI
Title
GNU bison缓冲区溢出漏洞
Description
GNU Bison是一款自由软件，用于自动生成语法分析器程序。 GNU bison 3.7.1.1-cb7dc-dirty中的src/symtab.c存在缓冲区溢出漏洞。本地攻击者可通过特制输入文件利用该漏洞导致系统崩溃。
Severity
中
Patch Name
GNU bison缓冲区溢出漏洞的补丁
Patch Description
GNU Bison是一款自由软件，用于自动生成语法分析器程序。 GNU bison 3.7.1.1-cb7dc-dirty中的src/symtab.c存在缓冲区溢出漏洞。本地攻击者可通过特制输入文件利用该漏洞导致系统崩溃。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/akimd/bison/commit/bfd851e2d621734886c66c0af26e861e718510b2

Reference
https://nvd.nist.gov/vuln/detail/CVE-2020-24979
Impacted products
Name
GNU Bison 3.7.1.1-cb7dc-dirty
Show details on source website
To clipboard 

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-24979",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-24979"
    }
  },
  "description": "GNU Bison\u662f\u4e00\u6b3e\u81ea\u7531\u8f6f\u4ef6\uff0c\u7528\u4e8e\u81ea\u52a8\u751f\u6210\u8bed\u6cd5\u5206\u6790\u5668\u7a0b\u5e8f\u3002\n\nGNU bison 3.7.1.1-cb7dc-dirty\u4e2d\u7684src/symtab.c\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7279\u5236\u8f93\u5165\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\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/akimd/bison/commit/bfd851e2d621734886c66c0af26e861e718510b2",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2020-51512",
  "openTime": "2020-09-11",
  "patchDescription": "GNU Bison\u662f\u4e00\u6b3e\u81ea\u7531\u8f6f\u4ef6\uff0c\u7528\u4e8e\u81ea\u52a8\u751f\u6210\u8bed\u6cd5\u5206\u6790\u5668\u7a0b\u5e8f\u3002\r\n\r\nGNU bison 3.7.1.1-cb7dc-dirty\u4e2d\u7684src/symtab.c\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u7279\u5236\u8f93\u5165\u6587\u4ef6\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\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": "GNU bison\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "GNU Bison 3.7.1.1-cb7dc-dirty"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-24979",
  "serverity": "\u4e2d",
  "submitTime": "2020-09-07",
  "title": "GNU bison\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e"
}



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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.



Related by attack behaviour

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