cnvd-2021-12099
Vulnerability from cnvd
Title
Firejail访问控制错误漏洞
Description
Firejail是一款使用C语言编写的SUID沙箱程序。 Firejail 0.9.64.4之前的版本存在访问控制错误漏洞，该漏洞源于在stat操作和OverlayFS mount操作之间存在toctou竞争条件，允许攻击者绕过预期的访问限制。
Severity
中
Patch Name
Firejail访问控制错误漏洞的补丁
Patch Description
Firejail是一款使用C语言编写的SUID沙箱程序。 Firejail 0.9.64.4之前的版本存在访问控制错误漏洞，该漏洞源于在stat操作和OverlayFS mount操作之间存在toctou竞争条件，允许攻击者绕过预期的访问限制。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

目前厂商已发布升级补丁以修复漏洞，补丁获取链接：https://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b

Reference
https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt
Impacted products
Name
Firejail Firejail <0.9.64.4
Show details on source website

To clipboard 

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-26910",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-26910"
    }
  },
  "description": "Firejail\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684SUID\u6c99\u7bb1\u7a0b\u5e8f\u3002\n\nFirejail 0.9.64.4\u4e4b\u524d\u7684\u7248\u672c\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728stat\u64cd\u4f5c\u548cOverlayFS mount\u64cd\u4f5c\u4e4b\u95f4\u5b58\u5728toctou\u7ade\u4e89\u6761\u4ef6\uff0c\u5141\u8bb8\u653b\u51fb\u8005\u7ed5\u8fc7\u9884\u671f\u7684\u8bbf\u95ee\u9650\u5236\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1ahttps://github.com/netblue30/firejail/commit/97d8a03cad19501f017587cc4e47d8418273834b",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-12099",
  "openTime": "2021-02-24",
  "patchDescription": "Firejail\u662f\u4e00\u6b3e\u4f7f\u7528C\u8bed\u8a00\u7f16\u5199\u7684SUID\u6c99\u7bb1\u7a0b\u5e8f\u3002\r\n\r\nFirejail 0.9.64.4\u4e4b\u524d\u7684\u7248\u672c\u5b58\u5728\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5728stat\u64cd\u4f5c\u548cOverlayFS mount\u64cd\u4f5c\u4e4b\u95f4\u5b58\u5728toctou\u7ade\u4e89\u6761\u4ef6\uff0c\u5141\u8bb8\u653b\u51fb\u8005\u7ed5\u8fc7\u9884\u671f\u7684\u8bbf\u95ee\u9650\u5236\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": "Firejail\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Firejail Firejail \u003c0.9.64.4"
  },
  "referenceLink": "https://unparalleled.eu/publications/2021/advisory-unpar-2021-0.txt",
  "serverity": "\u4e2d",
  "submitTime": "2021-02-23",
  "title": "Firejail\u8bbf\u95ee\u63a7\u5236\u9519\u8bef\u6f0f\u6d1e"
}


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