{
  "crds_version": "0.1",
  "kind": "base",
  "id": "crds:cve-2015-3246",
  "revision": 1,
  "title": "Red Hat libuser — Race Condition Corrupting /etc/passwd",
  "summary": "The libuser library, used by the userhelper tool, edits /etc/passwd directly. A local user who triggers an error mid-edit leaves the file in a broken state, denying service; chained with CVE-2015-3245 it can be used to gain privileges.",
  "source_type": "cve",
  "severity": "high",
  "cvss": {
    "score": 5.1,
    "vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
    "version": "3.1"
  },
  "epss": 0.08799,
  "exploitation": {
    "known_exploited": true,
    "exploit_available": true,
    "attack_complexity": "high",
    "kev_added": "2026-08-26",
    "prerequisites": "Local access as an unprivileged user on a host with the vulnerable libuser and userhelper"
  },
  "remediation": {
    "patch_available": true,
    "workaround_available": true,
    "fixed_in": [
      "libuser 0.56.13-8",
      "libuser 0.60-7"
    ]
  },
  "mitre_attack": [
    "T1068"
  ],
  "kill_chain": "privilege_escalation",
  "recommended_action": "Update libuser to 0.56.13-8 / 0.60-7 or later via the Red Hat errata, and apply the vendor mitigation on hosts you cannot patch yet.",
  "confidence": "medium",
  "provenance": [
    {
      "fields": [
        "cvss",
        "exploitation.attack_complexity",
        "exploitation.exploit_available",
        "references",
        "published_at"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2015-3246",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "exploitation.known_exploited",
        "exploitation.kev_added"
      ],
      "source": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "epss"
      ],
      "source": "https://api.first.org/data/v1/epss?cve=CVE-2015-3246",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "scrty-crds-pipeline/0.1"
    },
    {
      "fields": [
        "title",
        "summary",
        "severity",
        "remediation",
        "mitre_attack",
        "kill_chain",
        "recommended_action",
        "confidence",
        "tags",
        "exploitation.prerequisites"
      ],
      "source": "https://nvd.nist.gov/vuln/detail/CVE-2015-3246",
      "retrieved_at": "2026-09-21T07:05:11.841Z",
      "confidence": "high",
      "extractor": "claude-code"
    }
  ],
  "references": [
    {
      "type": "cve",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2015-3246",
      "label": "NVD record"
    },
    {
      "type": "cisa",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "label": "CISA Known Exploited Vulnerabilities catalog"
    },
    {
      "type": "vendor_advisory",
      "url": "http://rhn.redhat.com/errata/RHSA-2015-1482.html"
    },
    {
      "type": "vendor_advisory",
      "url": "http://rhn.redhat.com/errata/RHSA-2015-1483.html"
    },
    {
      "type": "vendor_advisory",
      "url": "https://access.redhat.com/articles/1537873"
    }
  ],
  "published_at": "2015-08-11T14:59:07.040Z",
  "issued_at": "2026-09-21T07:05:11.841Z",
  "tags": [
    "linux",
    "red-hat",
    "libuser",
    "race-condition",
    "privilege-escalation",
    "denial-of-service"
  ]
}