cnvd-2018-06691
Vulnerability from cnvd
Title: Linux kernel内核安全保护绕过漏洞
Description:
Linux kernel是一种计算机操作系统内核,以C语言和汇编语言写成,符合POSIX标准,按GNU通用公共许可证发行。
4.15.7及更早版本的Linux kernel中的drivers/block/floppy.c中的fd_locked_ioctl函数存在内核安全保护绕过漏洞。该漏洞产生的原因是软盘驱动程序在响应FDGETPRM ioctl时将内核指针复制到用户内存。攻击者可发送FDGETPRM ioctl并使用获得的内核指针利用该漏洞发现内核代码和数据的位置并绕过KASLR等内核安全保护。
Severity: 中
Patch Name: Linux kernel内核安全保护绕过漏洞的补丁
Patch Description:
Linux kernel是一种计算机操作系统内核,以C语言和汇编语言写成,符合POSIX标准,按GNU通用公共许可证发行。
4.15.7及更早版本的Linux kernel中的drivers/block/floppy.c中的fd_locked_ioctl函数存在内核安全保护绕过漏洞。该漏洞产生的原因是软盘驱动程序在响应FDGETPRM ioctl时将内核指针复制到用户内存。攻击者可发送FDGETPRM ioctl并使用获得的内核指针利用该漏洞发现内核代码和数据的位置并绕过KASLR等内核安全保护。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:
厂商已发布漏洞修复程序,请及时关注更新: https://lkml.org/lkml/2018/3/7/1116
Reference: https://nvd.nist.gov/vuln/detail/CVE-2018-7755
Name | Linux kernel <=4.15.7 |
---|
{ "cves": { "cve": { "cveNumber": "CVE-2018-7755" } }, "description": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\r\n\r\n4.15.7\u53ca\u66f4\u65e9\u7248\u672c\u7684Linux kernel\u4e2d\u7684drivers/block/floppy.c\u4e2d\u7684fd_locked_ioctl\u51fd\u6570\u5b58\u5728\u5185\u6838\u5b89\u5168\u4fdd\u62a4\u7ed5\u8fc7\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662f\u8f6f\u76d8\u9a71\u52a8\u7a0b\u5e8f\u5728\u54cd\u5e94FDGETPRM ioctl\u65f6\u5c06\u5185\u6838\u6307\u9488\u590d\u5236\u5230\u7528\u6237\u5185\u5b58\u3002\u653b\u51fb\u8005\u53ef\u53d1\u9001FDGETPRM ioctl\u5e76\u4f7f\u7528\u83b7\u5f97\u7684\u5185\u6838\u6307\u9488\u5229\u7528\u8be5\u6f0f\u6d1e\u53d1\u73b0\u5185\u6838\u4ee3\u7801\u548c\u6570\u636e\u7684\u4f4d\u7f6e\u5e76\u7ed5\u8fc7KASLR\u7b49\u5185\u6838\u5b89\u5168\u4fdd\u62a4\u3002", "discovererName": "Linux", "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://lkml.org/lkml/2018/3/7/1116", "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e", "number": "CNVD-2018-06691", "openTime": "2018-03-29", "patchDescription": "Linux kernel\u662f\u4e00\u79cd\u8ba1\u7b97\u673a\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\uff0c\u4ee5C\u8bed\u8a00\u548c\u6c47\u7f16\u8bed\u8a00\u5199\u6210\uff0c\u7b26\u5408POSIX\u6807\u51c6\uff0c\u6309GNU\u901a\u7528\u516c\u5171\u8bb8\u53ef\u8bc1\u53d1\u884c\u3002\r\n\r\n4.15.7\u53ca\u66f4\u65e9\u7248\u672c\u7684Linux kernel\u4e2d\u7684drivers/block/floppy.c\u4e2d\u7684fd_locked_ioctl\u51fd\u6570\u5b58\u5728\u5185\u6838\u5b89\u5168\u4fdd\u62a4\u7ed5\u8fc7\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662f\u8f6f\u76d8\u9a71\u52a8\u7a0b\u5e8f\u5728\u54cd\u5e94FDGETPRM ioctl\u65f6\u5c06\u5185\u6838\u6307\u9488\u590d\u5236\u5230\u7528\u6237\u5185\u5b58\u3002\u653b\u51fb\u8005\u53ef\u53d1\u9001FDGETPRM ioctl\u5e76\u4f7f\u7528\u83b7\u5f97\u7684\u5185\u6838\u6307\u9488\u5229\u7528\u8be5\u6f0f\u6d1e\u53d1\u73b0\u5185\u6838\u4ee3\u7801\u548c\u6570\u636e\u7684\u4f4d\u7f6e\u5e76\u7ed5\u8fc7KASLR\u7b49\u5185\u6838\u5b89\u5168\u4fdd\u62a4\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\u5185\u6838\u5b89\u5168\u4fdd\u62a4\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01", "products": { "product": "Linux kernel \u003c=4.15.7" }, "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2018-7755", "serverity": "\u4e2d", "submitTime": "2018-03-09", "title": "Linux kernel\u5185\u6838\u5b89\u5168\u4fdd\u62a4\u7ed5\u8fc7\u6f0f\u6d1e" }
Sightings
Author | Source | Type | Date |
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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.