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CVE-2015-3246

38
FAUCET Score

CVE-2015-3246 is a denial-of-service vulnerability affecting libuser versions before 0.56.13-8 and 0.60 before 0.60-7, specifically within the userhelper program in the usermode package used by Red Hat. It allows local users to cause an inconsistent /etc/passwd file state by triggering an error during modification. With a CVSS score of 7.2, this vulnerability is considered high severity, enabling local attackers to achieve complete confidentiality, integrity, and availability compromise. While not on the KEV catalog, exploit modules are available in Metasploit and ExploitDB, and it has garnered significant community discussion and media coverage, indicating active awareness and potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.56.13-5CPE matchmatch criteria
cpe:2.3:a:redhat:libuser:*:*:*:*:*:*:*:*
0.60-1CPE matchmatch criteria
cpe:2.3:a:redhat:libuser:0.60-1:*:*:*:*:*:*:*
0.60-2CPE matchmatch criteria
cpe:2.3:a:redhat:libuser:0.60-2:*:*:*:*:*:*:*
0.60-3CPE matchmatch criteria
cpe:2.3:a:redhat:libuser:0.60-3:*:*:*:*:*:*:*
0.60-4CPE matchmatch criteria
cpe:2.3:a:redhat:libuser:0.60-4:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.2HIGH

AV:L/AC:L/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
6.80%
Probability of exploitation in next 30 days
EPSS Percentile
93.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
Metasploit: Libuser roothelper Privilege Escalation · Jul 24, 2015
ExploitDB: EDB-44633 · May 16, 2018
This CVE's current EPSS score of 0.0680 is in the 98th percentile among its peer group of 3,236 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.5 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libuser-0:0.56.13-8.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libuser-0:0.60-7.ael7b_1
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: libuser

Vendor Advisories (1)

redhatCVE-2015-3246Important

libuser: Security flaw in handling /etc/passwd file

Jul 23, 2015

References

lists.fedoraproject.org / pipermail/package-announce/2015-August/163044.html
lists.fedoraproject.org / pipermail/package-announce/2015-July/162947.html
lists.opensuse.org / opensuse-security-announce/2015-08/msg00000.html
rhn.redhat.com / errata/RHSA-2015-1482.html
rhn.redhat.com / errata/RHSA-2015-1483.html
access.redhat.com / articles/1537873
exploit-db.com / exploits/44633
qualys.com / 2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt
Exploit
securityfocus.com / bid/76022
securitytracker.com / id/1033040