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Moderate glibc Vulnerability Patch for Red Hat Enterprise Linux 6

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Calendar Grey March 21, 2017
Scroller Redhat
A significant glibc security patch for Red Hat Enterprise Linux 6 versions tackles severe vulnerabilities found in the library.
An update for glibc is now available for Red Hat Enterprise Linux 6

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.

Summary

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.

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

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


Read the Full Advisory


Advisory ID: RHSA-2017:0680-01
Product: Red Hat Enterprise Linux
Issue date: 2017-03-21

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

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

Bugs Fixed

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

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