Issued:

2016-11-03

Updated:

2016-11-03

RHSA-2016:2573 - Low: glibc security, bug fix, and enhancement update

Synopsis

Low: glibc security, bug fix, and enhancement update

Type/Severity

Security Advisory Low

Topic

An update for glibc is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Low. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.

Security Fix(es):

• A stack overflow vulnerability was found in _nss_dns_getnetbyname_r. On systems with nsswitch configured to include "networks: dns" with a privileged or network-facing service that would attempt to resolve user-provided network names, an attacker could provide an excessively long network name, resulting in stack corruption and code execution. (CVE-2016-3075)

This issue was discovered by Florian Weimer (Red Hat).

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 Release Notes linked from the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

For the update to take effect, all services linked to the glibc library must be restarted, or the system rebooted.

Affected Products

Updated Packages

• nscd-2.17-157.el7.s390x.rpm
• glibc-devel-2.17-157.el7.x86_64.rpm
• glibc-debuginfo-2.17-157.el7.ppc64le.rpm
• glibc-devel-2.17-157.el7.ppc64.rpm
• glibc-2.17-157.el7.s390.rpm
• glibc-debuginfo-2.17-157.el7.aarch64.rpm
• glibc-debuginfo-2.17-157.el7.s390x.rpm
• glibc-common-2.17-157.el7.x86_64.rpm
• glibc-debuginfo-2.17-157.el7.ppc64.rpm
• glibc-headers-2.17-157.el7.aarch64.rpm
• glibc-2.17-157.el7.i686.rpm
• glibc-common-2.17-157.el7.ppc64.rpm
• glibc-headers-2.17-157.el7.ppc64le.rpm
• glibc-utils-2.17-157.el7.s390x.rpm
• glibc-static-2.17-157.el7.aarch64.rpm
• glibc-2.17-157.el7.s390x.rpm
• glibc-common-2.17-157.el7.ppc64le.rpm
• glibc-debuginfo-common-2.17-157.el7.x86_64.rpm
• glibc-static-2.17-157.el7.i686.rpm
• glibc-headers-2.17-157.el7.ppc64.rpm
• glibc-headers-2.17-157.el7.s390x.rpm
• glibc-2.17-157.el7.aarch64.rpm
• glibc-static-2.17-157.el7.ppc64.rpm
• glibc-static-2.17-157.el7.s390.rpm
• glibc-debuginfo-common-2.17-157.el7.ppc64.rpm
• glibc-utils-2.17-157.el7.ppc64.rpm
• glibc-devel-2.17-157.el7.s390.rpm
• glibc-debuginfo-common-2.17-157.el7.ppc.rpm
• glibc-debuginfo-2.17-157.el7.s390.rpm
• glibc-2.17-157.el7.ppc64.rpm
• glibc-2.17-157.el7.ppc64le.rpm
• glibc-2.17-157.el7.x86_64.rpm
• glibc-devel-2.17-157.el7.ppc.rpm
• glibc-utils-2.17-157.el7.x86_64.rpm
• glibc-static-2.17-157.el7.ppc.rpm
• glibc-debuginfo-2.17-157.el7.ppc.rpm
• glibc-static-2.17-157.el7.s390x.rpm
• glibc-static-2.17-157.el7.x86_64.rpm
• glibc-debuginfo-2.17-157.el7.i686.rpm
• glibc-utils-2.17-157.el7.ppc64le.rpm
• glibc-debuginfo-2.17-157.el7.x86_64.rpm
• glibc-2.17-157.el7.src.rpm
• glibc-devel-2.17-157.el7.aarch64.rpm
• glibc-devel-2.17-157.el7.i686.rpm
• glibc-headers-2.17-157.el7.x86_64.rpm
• glibc-static-2.17-157.el7.ppc64le.rpm
• glibc-utils-2.17-157.el7.aarch64.rpm
• glibc-common-2.17-157.el7.s390x.rpm
• glibc-devel-2.17-157.el7.s390x.rpm
• glibc-debuginfo-common-2.17-157.el7.ppc64le.rpm
• glibc-debuginfo-common-2.17-157.el7.s390x.rpm
• nscd-2.17-157.el7.x86_64.rpm
• glibc-debuginfo-common-2.17-157.el7.s390.rpm
• nscd-2.17-157.el7.ppc64.rpm
• glibc-2.17-157.el7.ppc.rpm
• glibc-devel-2.17-157.el7.ppc64le.rpm
• glibc-common-2.17-157.el7.aarch64.rpm
• nscd-2.17-157.el7.aarch64.rpm
• glibc-debuginfo-common-2.17-157.el7.i686.rpm
• nscd-2.17-157.el7.ppc64le.rpm

Fixes

• This content is not included.BZ - 971416
• This content is not included.BZ - 1027348
• This content is not included.BZ - 1064063
• This content is not included.BZ - 1099235
• This content is not included.BZ - 1140250
• This content is not included.BZ - 1211100
• This content is not included.BZ - 1211823
• This content is not included.BZ - 1249102
• This content is not included.BZ - 1255822
• This content is not included.BZ - 1276631
• This content is not included.BZ - 1276753
• This content is not included.BZ - 1293976
• This content is not included.BZ - 1298354
• This content is not included.BZ - 1305406
• This content is not included.BZ - 1320596
• This content is not included.BZ - 1321866
• This content is not included.BZ - 1335629
• This content is not included.BZ - 1335925
• This content is not included.BZ - 1346397

CVEs

• CVE-2016-3075

References

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

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.