Topic

An update for glibc is now available for Red Hat Enterprise Linux 8.

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.

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):

• glibc: getaddrinfo should reject IP addresses with trailing characters (CVE-2016-10739)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.1 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

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 8 s390x

Fixes

• BZ - 1347549 - CVE-2016-10739 glibc: getaddrinfo should reject IP addresses with trailing characters
• BZ - 1623537 - glibc: Test suite failure: math/test-ildouble-fma, math/test-ldouble-fma on ppc64le
• BZ - 1659293 - glibc: Fix rwlock/rdlock hang.
• BZ - 1659512 - glibc: Test suite failure: posix/tst-spawn
• BZ - 1662843 - glibc: realloc ncopies integer overflow [rhel-8]
• BZ - 1663035 - glibc: Backport gettext asprintf error handling fix
• BZ - 1664408 - glibc: Only build libm with -fno-math-errno
• BZ - 1670043 - glibc: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid long timeouts [rhel-8]
• BZ - 1672773 - glibc: Missing robust mutex compiler barriers in pthread_mutex_trylock.c
• BZ - 1691528 - glibc: Binary locale files vary within a mutilib set e.g. x86_64/i686 and should not.
• BZ - 1699194 - glibc: Address conflict between <sys/stat.h> and <linux/stat.h>
• BZ - 1701605 - glibc: The locale command returns a vague error message if the LOCPATH environment variable is defined.
• BZ - 1702539 - glibc: Fix hang in pldd
• BZ - 1706777 - glibc: [kselftests] net/run_netsocktests: Incompatible AF_MAX definition
• BZ - 1710478 - glibc: Fix crash during wide stream buffer flush
• BZ - 1710894 - glibc: Avoid ABI exposure of the NSS service_user type
• BZ - 1717347 - glibc: glibc-all-langpacks should only delete locale archive during uninstallation [rhel-8.1]
• BZ - 1717438 - glibc: __libc_freeres (under valgrind) triggers bad free in libdl if dlerror was not used
• BZ - 1722215 - glibc: During exit, skip wide buffer handling for legacy stdio handles
• BZ - 1724975 - glibc: Remove copy_file_range emulation
• BZ - 1725131 - glibc: Account for size of locale-archive in rpm package.
• BZ - 1727152 - glibc: Avoid nscd assertion failure during persistent db check

CVEs

• CVE-2016-10739

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.1_release_notes/