fkie_cve-2017-18078
Vulnerability from fkie_nvd
Published
2018-01-29 05:29
Modified
2024-11-21 03:19
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
cve@mitre.orghttp://lists.opensuse.org/opensuse-updates/2018-02/msg00109.htmlMailing List, Third Party Advisory
cve@mitre.orghttp://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2018/01/29/3Exploit, Mailing List, Third Party Advisory
cve@mitre.orghttps://github.com/systemd/systemd/issues/7736Exploit, Issue Tracking, Third Party Advisory
cve@mitre.orghttps://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
cve@mitre.orghttps://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2019/04/msg00022.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://www.exploit-db.com/exploits/43935/Exploit, Third Party Advisory, VDB Entry
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2018/01/29/4Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2018/01/29/3Exploit, Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/systemd/systemd/issues/7736Exploit, Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2019/04/msg00022.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.exploit-db.com/exploits/43935/Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2018/01/29/4Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
systemd_project systemd *
debian debian_linux 8.0
opensuse leap 42.3


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:systemd_project:systemd:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "8FFE2618-BA1B-4FAB-8449-83CAAFCDCFAA",
                     versionEndExcluding: "237",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                     matchCriteriaId: "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:opensuse:leap:42.3:*:*:*:*:*:*:*",
                     matchCriteriaId: "5F65DAB0-3DAD-49FF-BC73-3581CC3D5BF3",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         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.",
      },
      {
         lang: "es",
         value: "systemd-tmpfiles en systemd en versiones anteriores a la 237 intenta soportar cambios de propiedad/permisos en archivos con vínculos permanentes incluso aunque el sysctl fs.protected_hardlinks esté apagado. Esto permite que usuarios locales omitan las restricciones de acceso planeadas mediante vectores relacionados con un enlace permanente a un archivo para el que el usuario no tiene acceso de escritura, tal y como demuestra el cambio de propiedad del archivo /etc/passwd.",
      },
   ],
   id: "CVE-2017-18078",
   lastModified: "2024-11-21T03:19:18.847",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "MEDIUM",
            cvssData: {
               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,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               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,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2018-01-29T05:29:00.213",
   references: [
      {
         source: "cve@mitre.org",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://lists.opensuse.org/opensuse-updates/2018-02/msg00109.html",
      },
      {
         source: "cve@mitre.org",
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         ],
         url: "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html",
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      },
      {
         source: "cve@mitre.org",
         tags: [
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            "Issue Tracking",
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         ],
         url: "https://github.com/systemd/systemd/issues/7736",
      },
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      },
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      },
      {
         source: "cve@mitre.org",
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            "Third Party Advisory",
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         url: "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html",
      },
      {
         source: "cve@mitre.org",
         tags: [
            "Exploit",
            "Third Party Advisory",
            "VDB Entry",
         ],
         url: "https://www.exploit-db.com/exploits/43935/",
      },
      {
         source: "cve@mitre.org",
         tags: [
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         url: "https://www.openwall.com/lists/oss-security/2018/01/29/4",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
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      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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         ],
         url: "http://packetstormsecurity.com/files/146184/systemd-Local-Privilege-Escalation.html",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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         source: "af854a3a-2127-422b-91ae-364da2661108",
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         url: "https://github.com/systemd/systemd/issues/7736",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
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      },
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         source: "af854a3a-2127-422b-91ae-364da2661108",
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      },
      {
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         url: "https://lists.debian.org/debian-lts-announce/2019/04/msg00022.html",
      },
      {
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         url: "https://www.openwall.com/lists/oss-security/2018/01/29/4",
      },
   ],
   sourceIdentifier: "cve@mitre.org",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-59",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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