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RHEL 7 : libuser (RHSA-2015:1483)

high Nessus Plugin ID 84977

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite (shadow-utils) are included in these packages.

Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser (for example, userhelper) to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root.
(CVE-2015-3245, CVE-2015-3246)

Red Hat would like to thank Qualys for reporting these issues.

All libuser users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2015:1483

https://access.redhat.com/security/cve/cve-2015-3245

https://access.redhat.com/security/cve/cve-2015-3246

Plugin Details

Severity: High

ID: 84977

File Name: redhat-RHSA-2015-1483.nasl

Version: 2.24

Type: local

Agent: unix

Published: 7/24/2015

Updated: 10/24/2019

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.5

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:libuser, p-cpe:/a:redhat:enterprise_linux:libuser-debuginfo, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:7.3, cpe:/o:redhat:enterprise_linux:7.4, cpe:/o:redhat:enterprise_linux:7.5, cpe:/o:redhat:enterprise_linux:7.6, p-cpe:/a:redhat:enterprise_linux:libuser-devel, p-cpe:/a:redhat:enterprise_linux:libuser-python, cpe:/o:redhat:enterprise_linux:7.7, cpe:/o:redhat:enterprise_linux:7.2, cpe:/o:redhat:enterprise_linux:7.1

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/23/2015

Vulnerability Publication Date: 8/11/2015

Exploitable With

Core Impact

Metasploit (Libuser roothelper Privilege Escalation)

Reference Information

CVE: CVE-2015-3245, CVE-2015-3246

IAVA: 2015-A-0179

RHSA: 2015:1483