cnvd-2017-31732
Vulnerability from cnvd
Title: selinux-policy拒绝服务漏洞
Description:
SELinux（Security-Enhanced Linux）是美国国家安全局（NSA）和SCC（Secure Computing Corporation）共同开发的一个基于Linux系统的强制访问控制安全模块。selinux-policy是其中的一个Linux安全引擎引导规则。
selinux-policy中存在安全漏洞。本地攻击者可通过对/etc/passwd创建硬链接并更新selinux-policy利用该漏洞造成拒绝服务（无法使用SSH登录）。
Severity: 低
Patch Name: selinux-policy拒绝服务漏洞的补丁
Patch Description:
SELinux（Security-Enhanced Linux）是美国国家安全局（NSA）和SCC（Secure Computing Corporation）共同开发的一个基于Linux系统的强制访问控制安全模块。selinux-policy是其中的一个Linux安全引擎引导规则。
selinux-policy中存在安全漏洞。本地攻击者可通过对/etc/passwd创建硬链接并更新selinux-policy利用该漏洞造成拒绝服务（无法使用SSH登录）。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://bugzilla.redhat.com/show_bug.cgi?id=1218672
Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1218672
Impacted products
| Name | selinux selinux |
|---|
{
"cves": {
"cve": {
"cveNumber": "CVE-2015-3170"
}
},
"description": "SELinux\uff08Security-Enhanced Linux\uff09\u662f\u7f8e\u56fd\u56fd\u5bb6\u5b89\u5168\u5c40\uff08NSA\uff09\u548cSCC\uff08Secure Computing Corporation\uff09\u5171\u540c\u5f00\u53d1\u7684\u4e00\u4e2a\u57fa\u4e8eLinux\u7cfb\u7edf\u7684\u5f3a\u5236\u8bbf\u95ee\u63a7\u5236\u5b89\u5168\u6a21\u5757\u3002selinux-policy\u662f\u5176\u4e2d\u7684\u4e00\u4e2aLinux\u5b89\u5168\u5f15\u64ce\u5f15\u5bfc\u89c4\u5219\u3002\r\n\r\nselinux-policy\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5bf9/etc/passwd\u521b\u5efa\u786c\u94fe\u63a5\u5e76\u66f4\u65b0selinux-policy\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u65e0\u6cd5\u4f7f\u7528SSH\u767b\u5f55\uff09\u3002",
"discovererName": "Martin Prpi\u010d",
"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://bugzilla.redhat.com/show_bug.cgi?id=1218672",
"isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
"number": "CNVD-2017-31732",
"openTime": "2017-10-27",
"patchDescription": "SELinux\uff08Security-Enhanced Linux\uff09\u662f\u7f8e\u56fd\u56fd\u5bb6\u5b89\u5168\u5c40\uff08NSA\uff09\u548cSCC\uff08Secure Computing Corporation\uff09\u5171\u540c\u5f00\u53d1\u7684\u4e00\u4e2a\u57fa\u4e8eLinux\u7cfb\u7edf\u7684\u5f3a\u5236\u8bbf\u95ee\u63a7\u5236\u5b89\u5168\u6a21\u5757\u3002selinux-policy\u662f\u5176\u4e2d\u7684\u4e00\u4e2aLinux\u5b89\u5168\u5f15\u64ce\u5f15\u5bfc\u89c4\u5219\u3002\r\n\r\nselinux-policy\u4e2d\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\u3002\u672c\u5730\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u5bf9/etc/passwd\u521b\u5efa\u786c\u94fe\u63a5\u5e76\u66f4\u65b0selinux-policy\u5229\u7528\u8be5\u6f0f\u6d1e\u9020\u6210\u62d2\u7edd\u670d\u52a1\uff08\u65e0\u6cd5\u4f7f\u7528SSH\u767b\u5f55\uff09\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": "selinux-policy\u62d2\u7edd\u670d\u52a1\u6f0f\u6d1e\u7684\u8865\u4e01",
"products": {
"product": "selinux selinux"
},
"referenceLink": "https://bugzilla.redhat.com/show_bug.cgi?id=1218672",
"serverity": "\u4f4e",
"submitTime": "2017-09-07",
"title": "selinux-policy\u62d2\u7edd\u670d\u52a1\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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