cnvd-2020-68542
Vulnerability from cnvd
Title: Linux kernel代码问题漏洞（CNVD-2020-68542）
Description:
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。
Linux kernel 5.7.3之前版本存在安全漏洞，该漏洞源于存在一个与mm/gup.c和mm/huge_memory.c有关的问题。get_user_pages（aka gup）实现用于写时复制页面时，未能正确考虑读操作的语义，因此可以授予意外的写访问权。目前没有详细的漏洞细节提供。
Severity: 中
Patch Name: Linux kernel代码问题漏洞（CNVD-2020-68542）的补丁
Patch Description:
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。
Linux kernel 5.7.3之前版本存在安全漏洞，该漏洞源于存在一个与mm/gup.c和mm/huge_memory.c有关的问题。get_user_pages（aka gup）实现用于写时复制页面时，未能正确考虑读操作的语义，因此可以授予意外的写访问权。目前没有详细的漏洞细节提供。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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f
Reference: https://nvd.nist.gov/vuln/detail/CVE-2020-29374
Impacted products
| Name | Linux Linux kernel <5.7.3 |
|---|
{
"cves": {
"cve": {
"cveNumber": "CVE-2020-29374",
"cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-29374"
}
},
"description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel 5.7.3\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5b58\u5728\u4e00\u4e2a\u4e0emm/gup.c\u548cmm/huge_memory.c\u6709\u5173\u7684\u95ee\u9898\u3002get_user_pages\uff08aka gup\uff09\u5b9e\u73b0\u7528\u4e8e\u5199\u65f6\u590d\u5236\u9875\u9762\u65f6\uff0c\u672a\u80fd\u6b63\u786e\u8003\u8651\u8bfb\u64cd\u4f5c\u7684\u8bed\u4e49\uff0c\u56e0\u6b64\u53ef\u4ee5\u6388\u4e88\u610f\u5916\u7684\u5199\u8bbf\u95ee\u6743\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=17839856fd588f4ab6b789f482ed3ffd7c403e1f",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2020-68542",
"openTime": "2020-12-03",
"patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel 5.7.3\u4e4b\u524d\u7248\u672c\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5b58\u5728\u4e00\u4e2a\u4e0emm/gup.c\u548cmm/huge_memory.c\u6709\u5173\u7684\u95ee\u9898\u3002get_user_pages\uff08aka gup\uff09\u5b9e\u73b0\u7528\u4e8e\u5199\u65f6\u590d\u5236\u9875\u9762\u65f6\uff0c\u672a\u80fd\u6b63\u786e\u8003\u8651\u8bfb\u64cd\u4f5c\u7684\u8bed\u4e49\uff0c\u56e0\u6b64\u53ef\u4ee5\u6388\u4e88\u610f\u5916\u7684\u5199\u8bbf\u95ee\u6743\u3002\u76ee\u524d\u6ca1\u6709\u8be6\u7ec6\u7684\u6f0f\u6d1e\u7ec6\u8282\u63d0\u4f9b\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\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2020-68542\uff09\u7684\u8865\u4e01",
"products": {
"product": "Linux Linux kernel \u003c5.7.3"
},
"referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-29374",
"serverity": "\u4e2d",
"submitTime": "2020-12-01",
"title": "Linux kernel\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff08CNVD-2020-68542\uff09"
}
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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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