{
   "CVE_data_meta" : {
      "ASSIGNER" : "security@ubuntu.com",
      "DATE_PUBLIC" : "2018-10-25T00:00:00.000Z",
      "ID" : "CVE-2018-15687",
      "STATE" : "PUBLIC",
      "TITLE" : "systemd: chown_one() can dereference symlinks"
   },
   "affects" : {
      "vendor" : {
         "vendor_data" : [
            {
               "product" : {
                  "product_data" : [
                     {
                        "product_name" : "systemd",
                        "version" : {
                           "version_data" : [
                              {
                                 "affected" : "<=",
                                 "version_value" : "239"
                              }
                           ]
                        }
                     }
                  ]
               },
               "vendor_name" : "systemd"
            }
         ]
      }
   },
   "credit" : [
      {
         "lang" : "eng",
         "value" : "Jann Horn"
      }
   ],
   "data_format" : "MITRE",
   "data_type" : "CVE",
   "data_version" : "4.0",
   "description" : {
      "description_data" : [
         {
            "lang" : "eng",
            "value" : "A race condition in chown_one() of systemd allows an attacker to cause systemd to set arbitrary permissions on arbitrary files. Affected releases are systemd versions up to and including 239."
         }
      ]
   },
   "impact" : {
      "cvss" : {
         "attackComplexity" : "LOW",
         "attackVector" : "LOCAL",
         "availabilityImpact" : "HIGH",
         "baseScore" : 7.8,
         "baseSeverity" : "HIGH",
         "confidentialityImpact" : "HIGH",
         "integrityImpact" : "HIGH",
         "privilegesRequired" : "LOW",
         "scope" : "UNCHANGED",
         "userInteraction" : "NONE",
         "vectorString" : "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
         "version" : "3.0"
      }
   },
   "problemtype" : {
      "problemtype_data" : [
         {
            "description" : [
               {
                  "lang" : "eng",
                  "value" : "There is a race condition between a stat(2) call and the fchmodat(2) call."
               }
            ]
         }
      ]
   },
   "references" : {
      "reference_data" : [
         {
            "name" : "45715",
            "refsource" : "EXPLOIT-DB",
            "url" : "https://www.exploit-db.com/exploits/45715/"
         },
         {
            "name" : "https://github.com/systemd/systemd/pull/10517/commits",
            "refsource" : "MISC",
            "url" : "https://github.com/systemd/systemd/pull/10517/commits"
         },
         {
            "name" : "GLSA-201810-10",
            "refsource" : "GENTOO",
            "url" : "https://security.gentoo.org/glsa/201810-10"
         },
         {
            "name" : "USN-3816-1",
            "refsource" : "UBUNTU",
            "url" : "https://usn.ubuntu.com/3816-1/"
         },
         {
            "name" : "105748",
            "refsource" : "BID",
            "url" : "http://www.securityfocus.com/bid/105748"
         }
      ]
   },
   "source" : {
      "defect" : [
         "https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1796692"
      ],
      "discovery" : "EXTERNAL"
   }
}