cnvd-2019-06580
Vulnerability from cnvd
Title: Linux kernel userfaultfd tmpfs文件权限绕过漏洞
Description:
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。
Linux kernel 4.19.7之前版本中userfaultfd的实现存在安全漏洞，该漏洞源于程序未能正确地处理对UFFDIO_ ioctl调用的访问控制。本地攻击者可利用该漏洞写入数据。
Severity: 低
Patch Name: Linux kernel userfaultfd tmpfs文件权限绕过漏洞的补丁
Patch Description:
Linux kernel是美国Linux基金会发布的开源操作系统Linux所使用的内核。
Linux kernel 4.19.7之前版本中userfaultfd的实现存在安全漏洞，该漏洞源于程序未能正确地处理对UFFDIO_ ioctl调用的访问控制。本地攻击者可利用该漏洞写入数据。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： http://www.linux.com
Reference: https://nvd.nist.gov/vuln/detail/CVE-2018-18397
Impacted products
| Name | Linux kernel <4.19.7 |
|---|
{
"bids": {
"bid": {
"bidNumber": "106034"
}
},
"cves": {
"cve": {
"cveNumber": "CVE-2018-18397"
}
},
"description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel 4.19.7\u4e4b\u524d\u7248\u672c\u4e2duserfaultfd\u7684\u5b9e\u73b0\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u5730\u5904\u7406\u5bf9UFFDIO_ ioctl\u8c03\u7528\u7684\u8bbf\u95ee\u63a7\u5236\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5199\u5165\u6570\u636e\u3002",
"discovererName": "Andrea Arcangeli",
"formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u53d1\u5e03\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u6f0f\u6d1e\uff0c\u8865\u4e01\u83b7\u53d6\u94fe\u63a5\uff1a\r\nhttp://www.linux.com",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2019-06580",
"openTime": "2019-03-08",
"patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u53d1\u5e03\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel 4.19.7\u4e4b\u524d\u7248\u672c\u4e2duserfaultfd\u7684\u5b9e\u73b0\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u7a0b\u5e8f\u672a\u80fd\u6b63\u786e\u5730\u5904\u7406\u5bf9UFFDIO_ ioctl\u8c03\u7528\u7684\u8bbf\u95ee\u63a7\u5236\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5199\u5165\u6570\u636e\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": "Linux kernel userfaultfd tmpfs\u6587\u4ef6\u6743\u9650\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
"products": {
"product": "Linux kernel \u003c4.19.7"
},
"referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-18397",
"serverity": "\u4f4e",
"submitTime": "2018-12-13",
"title": "Linux kernel userfaultfd tmpfs\u6587\u4ef6\u6743\u9650\u7ed5\u8fc7\u6f0f\u6d1e"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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