Vulnerability in Libuser Project
CVE-2015-3246
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 · last modified .
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.088 (95.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 95.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.088 · newest: 0.088 · change: 0.000
Affected products
- Libuser Project
- openSUSE — versions 13.2
- Red Hat Enterprise Linux — versions 5.0, 6.0, 7.0
- Red Hat Libuser — versions 0.60-1, 0.60-2, 0.60-3
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
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.
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/76022 (Third Party Advisory, vdb-entry)
- lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html (vendor-advisory, Broken Link)
- www.exploit-db.com/exploits/44633/ (VDB Entry, Third Party Advisory, exploit)
- access.redhat.com/articles/1537873 (Mitigation, Vendor Advisory)
- rhn.redhat.com/errata/RHSA-2015-1482.html (vendor-advisory, Vendor Advisory)
- lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html (vendor-advisory, Broken Link)
- lists.opensuse.org/opensuse-security-announce/2015-08/msg00000.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-32… (Exploit)
- www.securitytracker.com/id/1033040 (Third Party Advisory, vdb-entry)
- rhn.redhat.com/errata/RHSA-2015-1483.html (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2015-3246?
- CVE-2015-3246 is a medium-severity vulnerability in Libuser Project, classified under CWE-264. CVSS score: 5.1/10. Published 2015-08-11.
- How severe is CVE-2015-3246?
- Medium severity. CVSS v3 base score is 5.1 out of 10.
- Is CVE-2015-3246 known to be exploited?
- Yes. CVE-2015-3246 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-26), indicating it is being actively exploited. 3 public proof-of-concept repositories are indexed.