Synopsis
Low: glibc security, bug fix, and enhancement update
Type/Severity
Security Advisory: Low
Topic
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 Low. 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):
- A stack overflow vulnerability was found in _nss_dns_getnetbyname_r. On systems with nsswitch configured to include "networks: dns" with a privileged or network-facing service that would attempt to resolve user-provided network names, an attacker could provide an excessively long network name, resulting in stack corruption and code execution. (CVE-2016-3075)
This issue was discovered by Florian Weimer (Red Hat).
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.3 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
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Red Hat Enterprise Linux Server 7 x86_64
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Red Hat Enterprise Linux Server - Extended Update Support 7.6 x86_64
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Red Hat Enterprise Linux Server - Extended Update Support 7.5 x86_64
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Red Hat Enterprise Linux Server - Extended Update Support 7.4 x86_64
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Red Hat Enterprise Linux Server - Extended Update Support 7.3 x86_64
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Red Hat Enterprise Linux Server - AUS 7.6 x86_64
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Red Hat Enterprise Linux Server - AUS 7.4 x86_64
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Red Hat Enterprise Linux Workstation 7 x86_64
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Red Hat Enterprise Linux Desktop 7 x86_64
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Red Hat Enterprise Linux for IBM z Systems 7 s390x
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Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.6 s390x
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Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.5 s390x
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Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.4 s390x
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Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 7.3 s390x
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Red Hat Enterprise Linux for Power, big endian 7 ppc64
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Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.6 ppc64
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Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.5 ppc64
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Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.4 ppc64
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Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
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Red Hat Enterprise Linux for Scientific Computing 7 x86_64
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Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
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Red Hat Enterprise Linux EUS Compute Node 7.5 x86_64
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Red Hat Enterprise Linux EUS Compute Node 7.4 x86_64
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Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
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Red Hat Enterprise Linux Server - AUS 7.3 x86_64
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Red Hat Enterprise Linux for Power, little endian 7 ppc64le
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Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.6 ppc64le
-
Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.5 ppc64le
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Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.4 ppc64le
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Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3 ppc64le
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Red Hat Enterprise Linux Server - TUS 7.6 x86_64
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Red Hat Enterprise Linux Server - TUS 7.3 x86_64
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Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.6 ppc64le
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Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.4 ppc64le
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Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.3 ppc64le
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Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.6 x86_64
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Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.4 x86_64
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Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.3 x86_64
Fixes
- BZ - 971416 - Locale alias no_NO.ISO-8859-1 not working.
- BZ - 1027348 - sem_post/sem_wait race causing sem_post to return EINVAL
- BZ - 1064063 - Test suite failure: tst-mqueue5
- BZ - 1099235 - CVE-2015-5277 glibc: nss_files doesn't detect ERANGE problems correctly [rhel-7.3]
- BZ - 1140250 - Unexpected results from using posix_fallocate with nfs target
- BZ - 1211100 - ld.so crash when audit modules provide path
- BZ - 1211823 - iconv: missing support for HKSCS-2008 in BIG5-HKSCS in rhel7 glibc
- BZ - 1249102 - "monstartup: out of memory" on PPC64LE
- BZ - 1255822 - glibc: malloc may fall back to calling mmap prematurely if arenas are contended
- BZ - 1276631 - glibc: hide backtrace from tst-malloc-backtrace
- BZ - 1276753 - malloc: arena free list can become cyclic, increasing contention
- BZ - 1293976 - CVE-2015-5229 glibc: calloc() returns non-zero'ed memory [rhel-7.3.0]
- BZ - 1298354 - Backport test-skeleton.c conversions.
- BZ - 1305406 - invalid fastbin entry (free), missing glibc patch
- BZ - 1320596 - glibc: NULL pointer dereference in stub resolver with unconnectable name server addresses
- BZ - 1321866 - CVE-2016-3075 glibc: Stack overflow in nss_dns_getnetbyname_r
- BZ - 1335629 - aarch64: MINSIGSTKSZ is (much) too small
- BZ - 1335925 - glibc: Fix aarch64 ABI issues
- BZ - 1346397 - glibc: debug/tst-longjump_chk2 calls printf from a signal handler
CVEs
References
Vulmon