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Red Hat Security Advisory 2017-1916-01

Red Hat Security Advisory 2017-1916-01
Posted Aug 2, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-1916-01 - The glibc packages provide the standard C libraries, POSIX thread libraries, standard math libraries, and the name service cache daemon used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly. Security Fix: A stack overflow vulnerability was found in nan* functions that could cause applications, which process long strings with the nan function, to crash or, potentially, execute arbitrary code.

tags | advisory, overflow, arbitrary
systems | linux, redhat, osx
advisories | CVE-2014-9761, CVE-2015-8776, CVE-2015-8777, CVE-2015-8778, CVE-2015-8779
MD5 | fb9dfc8a0c17eb7425413e38d3339afa

Red Hat Security Advisory 2017-1916-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: glibc security, bug fix, and enhancement update
Advisory ID: RHSA-2017:1916-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2017:1916
Issue date: 2017-08-01
CVE Names: CVE-2014-9761 CVE-2015-8776 CVE-2015-8777
CVE-2015-8778 CVE-2015-8779
=====================================================================

1. Summary:

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 Moderate. 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. 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 nan* functions that could
cause applications, which process long strings with the nan function, to
crash or, potentially, execute arbitrary code. (CVE-2014-9761)

* It was found that out-of-range time values passed to the strftime()
function could result in an out-of-bounds memory access. This could lead to
application crash or, potentially, information disclosure. (CVE-2015-8776)

* An integer overflow vulnerability was found in hcreate() and hcreate_r()
functions which could result in an out-of-bounds memory access. This could
lead to application crash or, potentially, arbitrary code execution.
(CVE-2015-8778)

* A stack based buffer overflow vulnerability was found in the catopen()
function. An excessively long string passed to the function could cause it
to crash or, potentially, execute arbitrary code. (CVE-2015-8779)

* It was found that the dynamic loader did not sanitize the
LD_POINTER_GUARD environment variable. An attacker could use this flaw to
bypass the pointer guarding protection on set-user-ID or set-group-ID
programs to execute arbitrary code with the permissions of the user running
the application. (CVE-2015-8777)

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.4 Release Notes linked from the References section.

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

906468 - Deadlock in glibc between fork and malloc
1213603 - glibc: nss_db: get*ent crashes without preceding set*ent
1260581 - CVE-2015-8777 glibc: LD_POINTER_GUARD in the environment is not sanitized
1298975 - [RFE] Backport the groups merging feature
1300299 - CVE-2015-8776 glibc: Segmentation fault caused by passing out-of-range data to strftime()
1300303 - CVE-2015-8778 glibc: Integer overflow in hcreate and hcreate_r
1300310 - CVE-2014-9761 glibc: Unbounded stack allocation in nan* functions
1300312 - CVE-2015-8779 glibc: Unbounded stack allocation in catopen function
1318877 - Per C11 and C++11, <stdint.h> should not look at __STDC_LIMIT_MACROS or __STDC_CONSTANT_MACROS
1318890 - glibc: nss_db: long group entries are skipped
1322544 - Segmentation violation can occur within glibc if fork() is used in a multi-threaded application
1324568 - glibc: getent returns dud entry when nscd enabled
1325138 - glibc: Corrupted aux-cache causes ldconfig to segfault
1330705 - open() and openat() ignore 'mode' with O_TMPFILE on newer kernels
1338672 - glibc: GCC 6 enablement for struct sockaddr_storage
1366569 - glibc: default nsswitch.conf should not set initgroups
1370630 - glibc: nss_db: Endless loop in services database processing
1387874 - MSG_FASTOPEN definition missing
1392540 - glibc: default nsswitch.conf does not list sss for the automount service
1404435 - "yum update" on fresh installation of RHEL 7.0 or 7.1 PPC64 (updating to 7.3) results in various yum errors
1417205 - Missing AF_VSOCK <sys/socket.h> constant
1418978 - glibc: backport upstream support/ directory
1421155 - Update dynamic loader trampoline for Intel SSE, AVX, and AVX512 usage.
1439165 - glibc: SYS_getrandom definition missing on s390x

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
glibc-2.17-196.el7.src.rpm

x86_64:
glibc-2.17-196.el7.i686.rpm
glibc-2.17-196.el7.x86_64.rpm
glibc-common-2.17-196.el7.x86_64.rpm
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-devel-2.17-196.el7.i686.rpm
glibc-devel-2.17-196.el7.x86_64.rpm
glibc-headers-2.17-196.el7.x86_64.rpm
glibc-utils-2.17-196.el7.x86_64.rpm
nscd-2.17-196.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-static-2.17-196.el7.i686.rpm
glibc-static-2.17-196.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
glibc-2.17-196.el7.src.rpm

x86_64:
glibc-2.17-196.el7.i686.rpm
glibc-2.17-196.el7.x86_64.rpm
glibc-common-2.17-196.el7.x86_64.rpm
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-devel-2.17-196.el7.i686.rpm
glibc-devel-2.17-196.el7.x86_64.rpm
glibc-headers-2.17-196.el7.x86_64.rpm
glibc-utils-2.17-196.el7.x86_64.rpm
nscd-2.17-196.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-static-2.17-196.el7.i686.rpm
glibc-static-2.17-196.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
glibc-2.17-196.el7.src.rpm

aarch64:
glibc-2.17-196.el7.aarch64.rpm
glibc-common-2.17-196.el7.aarch64.rpm
glibc-debuginfo-2.17-196.el7.aarch64.rpm
glibc-devel-2.17-196.el7.aarch64.rpm
glibc-headers-2.17-196.el7.aarch64.rpm
glibc-utils-2.17-196.el7.aarch64.rpm
nscd-2.17-196.el7.aarch64.rpm

ppc64:
glibc-2.17-196.el7.ppc.rpm
glibc-2.17-196.el7.ppc64.rpm
glibc-common-2.17-196.el7.ppc64.rpm
glibc-debuginfo-2.17-196.el7.ppc.rpm
glibc-debuginfo-2.17-196.el7.ppc64.rpm
glibc-debuginfo-common-2.17-196.el7.ppc.rpm
glibc-debuginfo-common-2.17-196.el7.ppc64.rpm
glibc-devel-2.17-196.el7.ppc.rpm
glibc-devel-2.17-196.el7.ppc64.rpm
glibc-headers-2.17-196.el7.ppc64.rpm
glibc-utils-2.17-196.el7.ppc64.rpm
nscd-2.17-196.el7.ppc64.rpm

ppc64le:
glibc-2.17-196.el7.ppc64le.rpm
glibc-common-2.17-196.el7.ppc64le.rpm
glibc-debuginfo-2.17-196.el7.ppc64le.rpm
glibc-debuginfo-common-2.17-196.el7.ppc64le.rpm
glibc-devel-2.17-196.el7.ppc64le.rpm
glibc-headers-2.17-196.el7.ppc64le.rpm
glibc-utils-2.17-196.el7.ppc64le.rpm
nscd-2.17-196.el7.ppc64le.rpm

s390x:
glibc-2.17-196.el7.s390.rpm
glibc-2.17-196.el7.s390x.rpm
glibc-common-2.17-196.el7.s390x.rpm
glibc-debuginfo-2.17-196.el7.s390.rpm
glibc-debuginfo-2.17-196.el7.s390x.rpm
glibc-debuginfo-common-2.17-196.el7.s390.rpm
glibc-debuginfo-common-2.17-196.el7.s390x.rpm
glibc-devel-2.17-196.el7.s390.rpm
glibc-devel-2.17-196.el7.s390x.rpm
glibc-headers-2.17-196.el7.s390x.rpm
glibc-utils-2.17-196.el7.s390x.rpm
nscd-2.17-196.el7.s390x.rpm

x86_64:
glibc-2.17-196.el7.i686.rpm
glibc-2.17-196.el7.x86_64.rpm
glibc-common-2.17-196.el7.x86_64.rpm
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-devel-2.17-196.el7.i686.rpm
glibc-devel-2.17-196.el7.x86_64.rpm
glibc-headers-2.17-196.el7.x86_64.rpm
glibc-utils-2.17-196.el7.x86_64.rpm
nscd-2.17-196.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

aarch64:
glibc-debuginfo-2.17-196.el7.aarch64.rpm
glibc-static-2.17-196.el7.aarch64.rpm

ppc64:
glibc-debuginfo-2.17-196.el7.ppc.rpm
glibc-debuginfo-2.17-196.el7.ppc64.rpm
glibc-debuginfo-common-2.17-196.el7.ppc.rpm
glibc-debuginfo-common-2.17-196.el7.ppc64.rpm
glibc-static-2.17-196.el7.ppc.rpm
glibc-static-2.17-196.el7.ppc64.rpm

ppc64le:
glibc-debuginfo-2.17-196.el7.ppc64le.rpm
glibc-debuginfo-common-2.17-196.el7.ppc64le.rpm
glibc-static-2.17-196.el7.ppc64le.rpm

s390x:
glibc-debuginfo-2.17-196.el7.s390.rpm
glibc-debuginfo-2.17-196.el7.s390x.rpm
glibc-debuginfo-common-2.17-196.el7.s390.rpm
glibc-debuginfo-common-2.17-196.el7.s390x.rpm
glibc-static-2.17-196.el7.s390.rpm
glibc-static-2.17-196.el7.s390x.rpm

x86_64:
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-static-2.17-196.el7.i686.rpm
glibc-static-2.17-196.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
glibc-2.17-196.el7.src.rpm

x86_64:
glibc-2.17-196.el7.i686.rpm
glibc-2.17-196.el7.x86_64.rpm
glibc-common-2.17-196.el7.x86_64.rpm
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-devel-2.17-196.el7.i686.rpm
glibc-devel-2.17-196.el7.x86_64.rpm
glibc-headers-2.17-196.el7.x86_64.rpm
glibc-utils-2.17-196.el7.x86_64.rpm
nscd-2.17-196.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
glibc-debuginfo-2.17-196.el7.i686.rpm
glibc-debuginfo-2.17-196.el7.x86_64.rpm
glibc-debuginfo-common-2.17-196.el7.i686.rpm
glibc-debuginfo-common-2.17-196.el7.x86_64.rpm
glibc-static-2.17-196.el7.i686.rpm
glibc-static-2.17-196.el7.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2014-9761
https://access.redhat.com/security/cve/CVE-2015-8776
https://access.redhat.com/security/cve/CVE-2015-8777
https://access.redhat.com/security/cve/CVE-2015-8778
https://access.redhat.com/security/cve/CVE-2015-8779
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/7.4_Release_Notes/index.html

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
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