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TI-2015-02874 Aliases CVE-2015-3246GHSA-f52h-j689-x786

libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the…

Priority CRITICAL 92Exploited in the wildCWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 16 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-264.

Summary

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.

Why it matters now

Exploitation Active In CISA KEV since 2026-08-26CISA due date 2026-09-09
EPSS 0.08503 95th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA and NVD
Fix Partial Red Hat: 2 advisoriesRed Hat: 16 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*5.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*6.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*13.2VulnerableopenSUSE
cpe:2.3:a:libuser_project:libuser:*:*:*:*:*:*:*:*before 0.56.13-8; 0.60 to before 0.60-7VulnerableLibuser Project
  • cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:* Versions 5.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:* Versions 6.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* Versions 13.2 Vulnerable ·openSUSE
  • cpe:2.3:a:libuser_project:libuser:*:*:*:*:*:*:*:* Versions before 0.56.13-8; 0.60 to before 0.60-7 Vulnerable ·Libuser Project

Remediation

Red Hat 2 advisories

  • RHSA-2015:1483 Released 2015-07-23 · Red Hat rating Important
    libuser security update
    • Red Hat Enterprise Linux Client (v. 7) libuser-0.60-7.el7_1, libuser-python-0.60-7.el7_1
    • Red Hat Enterprise Linux Client Optional (v. 7) libuser-devel-0.60-7.el7_1
    • Red Hat Enterprise Linux ComputeNode (v. 7) libuser-0.60-7.el7_1, libuser-python-0.60-7.el7_1
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libuser-devel-0.60-7.el7_1
    • Red Hat Enterprise Linux Server (v. 7) libuser-0.60-7.ael7b_1, libuser-0.60-7.el7_1, libuser-0.60-7.el7_1.ppc +2
    • Red Hat Enterprise Linux Server Optional (v. 7) libuser-devel-0.60-7.ael7b_1, libuser-devel-0.60-7.el7_1, libuser-devel-0.60-7.el7_1.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) libuser-0.60-7.el7_1, libuser-python-0.60-7.el7_1
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libuser-devel-0.60-7.el7_1
  • RHSA-2015:1482 Released 2015-07-23 · Red Hat rating Important
    libuser security update
    • Red Hat Enterprise Linux Desktop (v. 6) libuser-0.56.13-8.el6_7, libuser-python-0.56.13-8.el6_7
    • Red Hat Enterprise Linux Desktop Optional (v. 6) libuser-devel-0.56.13-8.el6_7
    • Red Hat Enterprise Linux HPC Node (v. 6) libuser-0.56.13-8.el6_7, libuser-python-0.56.13-8.el6_7
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) libuser-devel-0.56.13-8.el6_7
    • Red Hat Enterprise Linux Server (v. 6) libuser-0.56.13-8.el6_7, libuser-0.56.13-8.el6_7.ppc, libuser-python-0.56.13-8.el6_7
    • Red Hat Enterprise Linux Server Optional (v. 6) libuser-devel-0.56.13-8.el6_7, libuser-devel-0.56.13-8.el6_7.ppc
    • Red Hat Enterprise Linux Workstation (v. 6) libuser-0.56.13-8.el6_7, libuser-python-0.56.13-8.el6_7
    • Red Hat Enterprise Linux Workstation Optional (v. 6) libuser-devel-0.56.13-8.el6_7

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2015:1483
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2015:1483
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2015:1483
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2015:1483
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2015:1483
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2015:1483
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2015:1483
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2015:1482
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2015:1483

Timeline

  1. 2026-08-26 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2015-3246
  3. 2026-10-03 Alias added: GHSA-f52h-j689-x786
  4. 2026-10-21 EPSS moved to the 95th–99th percentile

References

Exploit 2

Advisory 7

  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-10530 Code injection in [UNKNOWN] RichFaces KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-23530 Sudo before 1.9.17p1 allows local users to obtain root access because /etc/nsswitch.conf… KEVCVSS 3.1CRITICAL 9.3
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
See all 1955 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences