cnvd-2021-39045
Vulnerability from cnvd
Title: Linux kernel缓冲区溢出漏洞（CNVD-2021-39045）
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 5.12.7版本及之前版本中存在缓冲区错误漏洞，该漏洞源于对指针算术操作强制执行不正确的限制，可能会滥用这些操作在内核内存中执行越位的读写操作。攻击者可通过该漏洞从本地特权升级到root。
Severity: 高
Patch Name: Linux kernel缓冲区溢出漏洞（CNVD-2021-39045）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 5.12.7版本及之前版本中存在缓冲区错误漏洞，该漏洞源于对指针算术操作强制执行不正确的限制，可能会滥用这些操作在内核内存中执行越位的读写操作。攻击者可通过该漏洞从本地特权升级到root。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://www.openwall.com/lists/oss-security/2021/05/27/1
Reference: https://nvd.nist.gov/vuln/detail/CVE-2021-33200
Impacted products
| Name | Linux Linux kernel <=5.12.7 |
|---|
{
"cves": {
"cve": {
"cveNumber": "CVE-2021-33200"
}
},
"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 5.12.7\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u7f13\u51b2\u533a\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5bf9\u6307\u9488\u7b97\u672f\u64cd\u4f5c\u5f3a\u5236\u6267\u884c\u4e0d\u6b63\u786e\u7684\u9650\u5236\uff0c\u53ef\u80fd\u4f1a\u6ee5\u7528\u8fd9\u4e9b\u64cd\u4f5c\u5728\u5185\u6838\u5185\u5b58\u4e2d\u6267\u884c\u8d8a\u4f4d\u7684\u8bfb\u5199\u64cd\u4f5c\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u8be5\u6f0f\u6d1e\u4ece\u672c\u5730\u7279\u6743\u5347\u7ea7\u5230root\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\uff1a\r\nhttps://www.openwall.com/lists/oss-security/2021/05/27/1",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2021-39045",
"openTime": "2021-06-03",
"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 5.12.7\u7248\u672c\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u5b58\u5728\u7f13\u51b2\u533a\u9519\u8bef\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u5bf9\u6307\u9488\u7b97\u672f\u64cd\u4f5c\u5f3a\u5236\u6267\u884c\u4e0d\u6b63\u786e\u7684\u9650\u5236\uff0c\u53ef\u80fd\u4f1a\u6ee5\u7528\u8fd9\u4e9b\u64cd\u4f5c\u5728\u5185\u6838\u5185\u5b58\u4e2d\u6267\u884c\u8d8a\u4f4d\u7684\u8bfb\u5199\u64cd\u4f5c\u3002\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u8be5\u6f0f\u6d1e\u4ece\u672c\u5730\u7279\u6743\u5347\u7ea7\u5230root\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\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-39045\uff09\u7684\u8865\u4e01",
"products": {
"product": "Linux Linux kernel \u003c=5.12.7"
},
"referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2021-33200",
"serverity": "\u9ad8",
"submitTime": "2021-05-28",
"title": "Linux kernel\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-39045\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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