{"cve":{"cve_id":"CVE-2015-3246","is_kev":true,"kev_date_added":"2026-08-26","kev_vendor_project":"Red Hat","kev_product":"Libuser","kev_vulnerability_name":"Red Hat Libuser Race Condition Vulnerability","kev_short_description":"Red Hat libuser contains a race condition vulnerability that allows authenticated local users to corrupt the /etc/passwd file to cause a denial of service or privilege escalation. ","kev_required_action":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","kev_due_date":"2026-09-09","kev_known_ransomware":false,"kev_notes":"This vulnerability affects an open-source component, third-party library, protocol, or proprietary implementation that could be used by different products. For more information, please see: https://access.redhat.com/articles/1537873 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2015-3246","kev_cwes":[],"epss_score":0.07092,"epss_percentile":0.93742,"epss_as_of":"2026-08-26","description":"libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, directly modifies /etc/passwd, which allows local users to cause a denial of service (inconsistent file state) by causing an error during the modification. NOTE: this issue can be combined with CVE-2015-3245 to gain privileges.","published_at":"2015-08-11T14:00:00Z","last_modified_at":"2026-08-27T04:16:36.600000Z","cvss_v3_score":5.1,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-367"],"nvd_references":["http://www.securityfocus.com/bid/76022","http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html","https://www.exploit-db.com/exploits/44633/","https://access.redhat.com/articles/1537873","http://rhn.redhat.com/errata/RHSA-2015-1482.html","http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html","http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.html","https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt","http://www.securitytracker.com/id/1033040","http://rhn.redhat.com/errata/RHSA-2015-1483.html"],"vuln_status":"Analyzed","trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-08-27T17:38:41.369924Z"},"effective_severity":"MEDIUM","badges":["kev","exploit"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"libuser-project","vendor_name":"libuser_project","product_slug":"libuser","product_name":"libuser","version_start":null,"version_start_inclusive":null,"version_end":"0.56.13-8","version_end_inclusive":false,"cpe23_uri":"cpe:2.3:a:libuser_project:libuser:*:*:*:*:*:*:*:*"},{"vendor_slug":"opensuse","vendor_name":"openSUSE","product_slug":"opensuse","product_name":"opensuse","version_start":"13.2","version_start_inclusive":true,"version_end":"13.2","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux","product_name":"enterprise_linux","version_start":"5.0","version_start_inclusive":true,"version_end":"5.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux","product_name":"enterprise_linux","version_start":"6.0","version_start_inclusive":true,"version_end":"6.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*"},{"vendor_slug":"redhat","vendor_name":"RedHat","product_slug":"enterprise-linux","product_name":"enterprise_linux","version_start":"7.0","version_start_inclusive":true,"version_end":"7.0","version_end_inclusive":true,"cpe23_uri":"cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*"}],"exploit_refs":[{"source":"exploit-db","kind":"exploit-db","url":"https://www.exploit-db.com/exploits/44633","title":"Libuser - 'roothelper' Local Privilege Escalation (Metasploit)","author":"Metasploit","disclosed_at":"2018-05-16"},{"source":"exploit-db","kind":"exploit-db","url":"https://www.exploit-db.com/exploits/37706","title":"Libuser Library - Multiple Vulnerabilities","author":"Qualys Corporation","disclosed_at":"2015-07-27"}],"news":[],"references":[{"url":"http://www.securityfocus.com/bid/76022","source_type":"MISC","tags":[]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://www.exploit-db.com/exploits/44633/","source_type":"EXPLOIT","tags":["exploit"]},{"url":"https://access.redhat.com/articles/1537873","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-1482.html","source_type":"MISC","tags":[]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.html","source_type":"MAILING_LIST","tags":["mailing-list"]},{"url":"https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt","source_type":"MISC","tags":[]},{"url":"http://www.securitytracker.com/id/1033040","source_type":"MISC","tags":[]},{"url":"http://rhn.redhat.com/errata/RHSA-2015-1483.html","source_type":"MISC","tags":[]}],"timeline":[{"type":"exploit_known","at":"2015-07-27T00:00:00Z","label":"Public exploit available","source":"exploit-db"},{"type":"published","at":"2015-08-11T14:00:00Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2026-08-26T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"ssvc_changed","at":"2026-08-26T18:40:11.368954Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-26T18:40:11.368954Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-08-26T18:40:11.368954Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-26T18:40:11.368954Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-26T18:40:11.368954Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-26T18:40:11.368954Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-08-26T19:39:11.366523Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-08-26T19:39:11.366523Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-08-26T19:39:11.366523Z","label":"CVSS score revised","source":"cvelistv5"}]}