Patch  oval:com.redhat.rhsa:def:20160176
RHSA-2016:0176: glibc security and bug fix update (Critical)  

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.
A stack-based buffer overflow was found in the way the libresolv library performed dual A/AAAA DNS queries. A remote attacker could create a specially crafted DNS response which could cause libresolv to crash or, potentially, execute code with the permissions of the user running the library. Note: this issue is only exposed when libresolv is called from the nss_dns NSS service module. (CVE-2015-7547)
It was discovered that the calloc implementation in glibc could return memory areas which contain non-zero bytes. This could result in unexpected application behavior such as hangs or crashes. (CVE-2015-5229)
The CVE-2015-7547 issue was discovered by the Google Security Team and Red Hat. Red Hat would like to thank Jeff Layton for reporting the CVE-2015-5229 issue.
This update also fixes the following bugs:
* The existing implementation of the "free" function causes all memory pools beyond the first to return freed memory directly to the operating system as quickly as possible. This can result in performance degradation when the rate of free calls is very high. The first memory pool (the main pool) does provide a method to rate limit the returns via M_TRIM_THRESHOLD, but this method is not available to subsequent memory pools.
With this update, the M_TRIM_THRESHOLD method is extended to apply to all memory pools, which improves performance for threads with very high amounts of free calls and limits the number of "madvise" system calls. The change also increases the total transient memory usage by processes because the trim threshold must be reached before memory can be freed.
To return to the previous behavior, you can either set M_TRIM_THRESHOLD using the "mallopt" function, or set the MALLOC_TRIM_THRESHOLD environment variable to 0. (BZ#1298930)
* On the little-endian variant of 64-bit IBM Power Systems (ppc64le), a bug in the dynamic loader could cause applications compiled with profiling enabled to fail to start with the error "monstartup: out of memory". The bug has been corrected and applications compiled for profiling now start correctly. (BZ#1298956)
All glibc users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.
Create Date: 2016-02-16 Last Update Date: 2016-02-16

Affected Platforms/Products

Affected Products (CPE + CVE references)
Total : 31
Platforms: unix (from OVAL definitions)
  • Red Hat Enterprise Linux 7

References

Criteria

The patch should be installed
IF : All of the following are true
IF : Any one of the following are true
IF : All of the following are true
IF : nscd is earlier than 0:2.17-106.el7_2.4
WARNING! Unknown test oval:com.redhat.rhsa:tst:20160176015. Please see help for possible reasons
IF : nscd is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  nscd is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20030334009 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : All of the following are true
IF : glibc-utils is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  glibc-utils is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20030334006 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : glibc-utils is earlier than 0:2.17-106.el7_2.4
WARNING! Unknown test oval:com.redhat.rhsa:tst:20160176013. Please see help for possible reasons
IF : All of the following are true
IF : glibc-static is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  glibc-static is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100872006 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : glibc-static is earlier than 0:2.17-106.el7_2.4
WARNING! Unknown test oval:com.redhat.rhsa:tst:20160176007. Please see help for possible reasons
IF : All of the following are true
IF : glibc-headers is earlier than 0:2.17-106.el7_2.4
WARNING! Unknown test oval:com.redhat.rhsa:tst:20160176005. Please see help for possible reasons
IF : glibc-headers is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  glibc-headers is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20030334007 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : All of the following are true
IF : glibc-devel is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  glibc-devel is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20030334005 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : glibc-devel is earlier than 0:2.17-106.el7_2.4
WARNING! Unknown test oval:com.redhat.rhsa:tst:20160176017. Please see help for possible reasons
IF : All of the following are true
IF : glibc-common is earlier than 0:2.17-106.el7_2.4
WARNING! Unknown test oval:com.redhat.rhsa:tst:20160176011. Please see help for possible reasons
IF : glibc-common is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  glibc-common is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20030334003 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : All of the following are true
IF : glibc is earlier than 0:2.17-106.el7_2.4
WARNING! Unknown test oval:com.redhat.rhsa:tst:20160176009. Please see help for possible reasons
IF : glibc is signed with Red Hat redhatrelease2 key
Linux : RPM Test :  glibc is signed with Red Hat redhatrelease2 key 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20030334002 (Object depth limit may be exceeded) !!!
signature_keyid equals 199e2f91fd431d51
linux : rpminfo_state 
IF : Any one of the following are true
IF : Red Hat Enterprise Linux 7 Client is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 Client is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842001 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 7 ComputeNode is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 ComputeNode is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842004 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 7 Workstation is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 Workstation is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842003 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 
IF : Red Hat Enterprise Linux 7 Server is installed
Linux : RPM Test :  Red Hat Enterprise Linux 7 Server is installed 
At least one of the objects listed below must exist on the system (Existence check)
Unknown object oval:com.redhat.rhsa:obj:20100842002 (Object depth limit may be exceeded) !!!
version pattern match ^7[^\d]
linux : rpminfo_state 

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