Vulnerability-Lookup

CNVD-2017-31732

Vulnerability from cnvd - Published: 2017-10-27

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

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

Show details on source website

JSON

To clipboard

{
  "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"
}

CVE-2015-3170 (GCVE-0-2015-3170)

Vulnerability from cvelistv5 – Published: 2017-07-21 14:00 – Updated: 2024-08-06 05:39

Summary

selinux-policy when sysctl fs.protected_hardlinks are set to 0 allows local users to cause a denial of service (SSH login prevention) by creating a hardlink to /etc/passwd from a directory named .config, and updating selinux-policy.

Severity

No CVSS data available.

CWE

Assigner

redhat redhat root

References

1 reference

URL	Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1218672	x_refsource_CONFIRM

Date Public

2015-05-05 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-06T05:39:31.987Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1218672"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2015-05-05T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "selinux-policy when sysctl fs.protected_hardlinks are set to 0 allows local users to cause a denial of service (SSH login prevention) by creating a hardlink to /etc/passwd from a directory named .config, and updating selinux-policy."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2017-07-21T13:57:01.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1218672"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2015-3170",
    "datePublished": "2017-07-21T14:00:00.000Z",
    "dateReserved": "2015-04-10T00:00:00.000Z",
    "dateUpdated": "2024-08-06T05:39:31.987Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.