gsd-2017-18078
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.
Aliases
Aliases
CVE-2017-18078


To clipboard 

{
   GSD: {
      alias: "CVE-2017-18078",
      description: "systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.",
      id: "GSD-2017-18078",
      references: [
         "https://www.suse.com/security/cve/CVE-2017-18078.html",
         "https://security.archlinux.org/CVE-2017-18078",
         "https://packetstormsecurity.com/files/cve/CVE-2017-18078",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2017-18078",
         ],
         details: "systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.",
         id: "GSD-2017-18078",
         modified: "2023-12-13T01:21:11.181788Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "cve@mitre.org",
            ID: "CVE-2017-18078",
            STATE: "PUBLIC",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "n/a",
                              version: {
                                 version_data: [
                                    {
                                       version_value: "n/a",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "n/a",
                  },
               ],
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         data_type: "CVE",
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                  value: "systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
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                        lang: "eng",
                        value: "n/a",
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         },
         references: {
            reference_data: [
               {
                  name: "openSUSE-SU-2018:0560",
                  refsource: "SUSE",
                  url: "http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html",
               },
               {
                  name: "[oss-security] 20180129 CVE-2018-18078: systemd-tmpfiles root privilege escalation with fs.protected_hardlinks=0",
                  refsource: "MLIST",
                  url: "http://www.openwall.com/lists/oss-security/2018/01/29/3",
               },
               {
                  name: "43935",
                  refsource: "EXPLOIT-DB",
                  url: "https://www.exploit-db.com/exploits/43935/",
               },
               {
                  name: "https://github.com/systemd/systemd/issues/7736",
                  refsource: "MISC",
                  url: "https://github.com/systemd/systemd/issues/7736",
               },
               {
                  name: "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html",
                  refsource: "MISC",
                  url: "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html",
               },
               {
                  name: "[oss-security] 20180129 Re: CVE-2017-18078: systemd-tmpfiles root privilege",
                  refsource: "MLIST",
                  url: "https://www.openwall.com/lists/oss-security/2018/01/29/4",
               },
               {
                  name: "[debian-lts-announce] 20190424 [SECURITY] [DLA 1762-1] systemd security update",
                  refsource: "MLIST",
                  url: "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html",
               },
               {
                  name: "[bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8",
                  refsource: "MLIST",
                  url: "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E",
               },
               {
                  name: "[bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8",
                  refsource: "MLIST",
                  url: "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "237",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "cve@mitre.org",
               ID: "CVE-2017-18078",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
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                  {
                     lang: "en",
                     value: "systemd-tmpfiles in systemd before 237 attempts to support ownership/permission changes on hardlinked files even if the fs.protected_hardlinks sysctl is turned off, which allows local users to bypass intended access restrictions via vectors involving a hard link to a file for which the user lacks write access, as demonstrated by changing the ownership of the /etc/passwd file.",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-59",
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            },
            references: {
               reference_data: [
                  {
                     name: "https://github.com/systemd/systemd/issues/7736",
                     refsource: "MISC",
                     tags: [
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                  },
                  {
                     name: "43935",
                     refsource: "EXPLOIT-DB",
                     tags: [
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                        "Third Party Advisory",
                        "VDB Entry",
                     ],
                     url: "https://www.exploit-db.com/exploits/43935/",
                  },
                  {
                     name: "[oss-security] 20180129 Re: CVE-2017-18078: systemd-tmpfiles root privilege",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "https://www.openwall.com/lists/oss-security/2018/01/29/4",
                  },
                  {
                     name: "[oss-security] 20180129 CVE-2018-18078: systemd-tmpfiles root privilege escalation with fs.protected_hardlinks=0",
                     refsource: "MLIST",
                     tags: [
                        "Exploit",
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "http://www.openwall.com/lists/oss-security/2018/01/29/3",
                  },
                  {
                     name: "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html",
                     refsource: "MISC",
                     tags: [
                        "Exploit",
                        "Third Party Advisory",
                        "VDB Entry",
                     ],
                     url: "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html",
                  },
                  {
                     name: "openSUSE-SU-2018:0560",
                     refsource: "SUSE",
                     tags: [
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html",
                  },
                  {
                     name: "[debian-lts-announce] 20190424 [SECURITY] [DLA 1762-1] systemd security update",
                     refsource: "MLIST",
                     tags: [
                        "Mailing List",
                        "Third Party Advisory",
                     ],
                     url: "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html",
                  },
                  {
                     name: "[bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8",
                     refsource: "MLIST",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4@%3Cissues.bookkeeper.apache.org%3E",
                  },
                  {
                     name: "[bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8",
                     refsource: "MLIST",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b@%3Cissues.bookkeeper.apache.org%3E",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "LOW",
                  accessVector: "LOCAL",
                  authentication: "NONE",
                  availabilityImpact: "PARTIAL",
                  baseScore: 4.6,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "PARTIAL",
                  vectorString: "AV:L/AC:L/Au:N/C:P/I:P/A:P",
                  version: "2.0",
               },
               exploitabilityScore: 3.9,
               impactScore: 6.4,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "MEDIUM",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "LOW",
                  attackVector: "LOCAL",
                  availabilityImpact: "HIGH",
                  baseScore: 7.8,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "LOW",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  version: "3.1",
               },
               exploitabilityScore: 1.8,
               impactScore: 5.9,
            },
         },
         lastModifiedDate: "2022-01-31T18:24Z",
         publishedDate: "2018-01-29T05:29Z",
      },
   },
}


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