Original 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.
Known exploited (CISA KEV)
- Added to KEV
- 2026-08-26
- Remediation due (US federal)
- 2026-09-09
- Ransomware use
- Unknown
- 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.
Details
- Published
- 2015-08-11
- Last modified
- 2026-10-02
- CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H- EPSS (30-day exploit probability)
- 8.50% (percentile 95)
References
- cve.org/CVE-2015-3246
- nvd.nist.gov/vuln/detail/CVE-2015-3246
- www.securityfocus.com/bid/76022
- lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html
- www.exploit-db.com/exploits/44633/
- access.redhat.com/articles/1537873
- rhn.redhat.com/errata/RHSA-2015-1482.html
- lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html
- lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.html
- www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt
- www.securitytracker.com/id/1033040
- rhn.redhat.com/errata/RHSA-2015-1483.html
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