Sigurnosni nedostaci programskog paketa glibc

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Red Hat Security Advisory

Synopsis: Moderate: glibc security and bug fix update
Advisory ID: RHSA-2017:0680-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0680.html
Issue date: 2017-03-21
CVE Names: CVE-2014-9761 CVE-2015-8776 CVE-2015-8778
CVE-2015-8779
=====================================================================

1. Summary:

An update for glibc is now available for Red Hat Enterprise Linux 6.

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 Desktop (v. 6) – i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) – i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) – x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) – x86_64
Red Hat Enterprise Linux Server (v. 6) – i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) – i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) – i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) – i386, 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)

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 6.9 Release Notes and Red Hat Enterprise Linux 6.9
Technical 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/):

1012343 – Thread issue in glibc can cause the application to not get any identity information
1101858 – glibc: Add el_GR@euro, ur_IN, and wal_ET locales
1223095 – access to uninitialized memory in getaddrinfo if nscd is running
1270950 – getaddrinfo() takes long time when lots of IP addresses are configured
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
1338673 – glibc: GCC 6 enablement for struct sockaddr_storage [el6]
1373646 – tzdata-update uses default umask
1416496 – getaddrinfo() call returns wrong IPv6 address if nscd is used

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
glibc-2.12-1.209.el6.src.rpm

i386:
glibc-2.12-1.209.el6.i686.rpm
glibc-common-2.12-1.209.el6.i686.rpm
glibc-debuginfo-2.12-1.209.el6.i686.rpm
glibc-debuginfo-common-2.12-1.209.el6.i686.rpm
glibc-devel-2.12-1.209.el6.i686.rpm
glibc-headers-2.12-1.209.el6.i686.rpm
glibc-utils-2.12-1.209.el6.i686.rpm
nscd-2.12-1.209.el6.i686.rpm

x86_64:
glibc-2.12-1.209.el6.i686.rpm
glibc-2.12-1.209.el6.x86_64.rpm
glibc-common-2.12-1.209.el6.x86_64.rpm
glibc-debuginfo-2.12-1.209.el6.i686.rpm
glibc-debuginfo-2.12-1.209.el6.x86_64.rpm
glibc-debuginfo-common-2.12-1.209.el6.i686.rpm
glibc-debuginfo-common-2.12-1.209.el6.x86_64.rpm
glibc-devel-2.12-1.209.el6.i686.rpm
glibc-devel-2.12-1.209.el6.x86_64.rpm
glibc-headers-2.12-1.209.el6.x86_64.rpm
glibc-utils-2.12-1.209.el6.x86_64.rpm
nscd-2.12-1.209.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

i386:
glibc-debuginfo-2.12-1.209.el6.i686.rpm
glibc-debuginfo-common-2.12-1.209.el6.i686.rpm
glibc-static-2.12-1.209.el6.i686.rpm

x86_64:
glibc-debuginfo-2.12-1.209.el6.i686.rpm
glibc-debuginfo-2.12-1.209.el6.x86_64.rpm
glibc-debuginfo-common-2.12-1.209.el6.i686.rpm
glibc-debuginfo-common-2.12-1.209.el6.x86_64.rpm
glibc-static-2.12-1.209.el6.i686.rpm
glibc-static-2.12-1.209.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
glibc-2.12-1.209.el6.src.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

Red Hat Enterprise Linux Server (v. 6):

Source:
glibc-2.12-1.209.el6.src.rpm

ppc64:
glibc-2.12-1.209.el6.ppc.rpm
glibc-2.12-1.209.el6.ppc64.rpm
glibc-common-2.12-1.209.el6.ppc64.rpm
glibc-debuginfo-2.12-1.209.el6.ppc.rpm
glibc-debuginfo-2.12-1.209.el6.ppc64.rpm
glibc-debuginfo-common-2.12-1.209.el6.ppc.rpm
glibc-debuginfo-common-2.12-1.209.el6.ppc64.rpm
glibc-devel-2.12-1.209.el6.ppc.rpm
glibc-devel-2.12-1.209.el6.ppc64.rpm
glibc-headers-2.12-1.209.el6.ppc64.rpm
glibc-utils-2.12-1.209.el6.ppc64.rpm
nscd-2.12-1.209.el6.ppc64.rpm

s390x:
glibc-2.12-1.209.el6.s390.rpm
glibc-2.12-1.209.el6.s390x.rpm
glibc-common-2.12-1.209.el6.s390x.rpm
glibc-debuginfo-2.12-1.209.el6.s390.rpm
glibc-debuginfo-2.12-1.209.el6.s390x.rpm
glibc-debuginfo-common-2.12-1.209.el6.s390.rpm
glibc-debuginfo-common-2.12-1.209.el6.s390x.rpm
glibc-devel-2.12-1.209.el6.s390.rpm
glibc-devel-2.12-1.209.el6.s390x.rpm
glibc-headers-2.12-1.209.el6.s390x.rpm
glibc-utils-2.12-1.209.el6.s390x.rpm
nscd-2.12-1.209.el6.s390x.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

i386:
glibc-debuginfo-2.12-1.209.el6.i686.rpm
glibc-debuginfo-common-2.12-1.209.el6.i686.rpm
glibc-static-2.12-1.209.el6.i686.rpm

ppc64:
glibc-debuginfo-2.12-1.209.el6.ppc.rpm
glibc-debuginfo-2.12-1.209.el6.ppc64.rpm
glibc-debuginfo-common-2.12-1.209.el6.ppc.rpm
glibc-debuginfo-common-2.12-1.209.el6.ppc64.rpm
glibc-static-2.12-1.209.el6.ppc.rpm
glibc-static-2.12-1.209.el6.ppc64.rpm

s390x:
glibc-debuginfo-2.12-1.209.el6.s390.rpm
glibc-debuginfo-2.12-1.209.el6.s390x.rpm
glibc-debuginfo-common-2.12-1.209.el6.s390.rpm
glibc-debuginfo-common-2.12-1.209.el6.s390x.rpm
glibc-static-2.12-1.209.el6.s390.rpm
glibc-static-2.12-1.209.el6.s390x.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
glibc-2.12-1.209.el6.src.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

i386:
glibc-debuginfo-2.12-1.209.el6.i686.rpm
glibc-debuginfo-common-2.12-1.209.el6.i686.rpm
glibc-static-2.12-1.209.el6.i686.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-2015-8778
https://access.redhat.com/security/cve/CVE-2015-8779
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

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