Issued:

2015-07-23

Updated:

2015-07-23

RHSA-2015:1483 - Important: libuser security update

Synopsis

Important: libuser security update

Type/Severity

Security Advisory Important

Topic

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.

Description

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

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

Updated Packages

• libuser-devel-0.60-7.el7_1.x86_64.rpm
• libuser-debuginfo-0.60-7.el7_1.ppc64.rpm
• libuser-debuginfo-0.60-7.el7_1.s390x.rpm
• libuser-devel-0.60-7.el7_1.ppc64.rpm
• libuser-debuginfo-0.60-7.el7_1.i686.rpm
• libuser-0.60-7.el7_1.i686.rpm
• libuser-0.60-7.el7_1.ppc64.rpm
• libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
• libuser-0.60-7.el7_1.src.rpm
• libuser-0.60-7.el7_1.ppc.rpm
• libuser-debuginfo-0.60-7.el7_1.ppc.rpm
• libuser-debuginfo-0.60-7.el7_1.s390.rpm
• libuser-python-0.60-7.el7_1.ppc64.rpm
• libuser-0.60-7.el7_1.x86_64.rpm
• libuser-devel-0.60-7.el7_1.i686.rpm
• libuser-devel-0.60-7.el7_1.s390.rpm
• libuser-python-0.60-7.el7_1.s390x.rpm
• libuser-0.60-7.el7_1.s390.rpm
• libuser-devel-0.60-7.el7_1.ppc.rpm
• libuser-0.60-7.el7_1.s390x.rpm
• libuser-devel-0.60-7.el7_1.s390x.rpm
• libuser-python-0.60-7.el7_1.x86_64.rpm

Fixes

• This content is not included.BZ - 1233043
• This content is not included.BZ - 1233052

CVEs

• CVE-2015-3245
• CVE-2015-3246

References

• https://access.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.