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Red Hat Enterprise Linux 7 RHSA-2016:2573-02 Low: Glibc Stack Overflow

red hat
Calendar Grey November 3, 2016
Scroller Redhat
Minor concern glibc security patch released for Red Hat Enterprise Linux 7, targeting buffer overflow vulnerabilities.
An update for glibc is now available for Red Hat Enterprise Linux 7

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 _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.

Topics%20covered

Topics Covered

security advisory security update Red Hat Enterprise Linux glibc low impact stack overflow

References

https://access.redhat.com/security/cve/CVE-2016-3075 https://access.redhat.com/security/updates/classification#low https://docs.redhat.com/en/documentation/Red_Hat_Enterprise_Linux/7/html/7.3_Release_Notes/index.html

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: glibc-2.17-157.el7.src.rpm
x86_64: glibc-2.17-157.el7.i686.rpm glibc-2.17-157.el7.x86_64.rpm glibc-common-2.17-157.el7.x86_64.rpm glibc-debuginfo-2.17-157.el7.i686.rpm glibc-debuginfo-2.17-157.el7.x86_64.rpm glibc-debuginfo-common-2.17-157.el7.i686.rpm glibc-debuginfo-common-2.17-157.el7.x86_64.rpm glibc-devel-2.17-157.el7.i686.rpm glibc-devel-2.17-157.el7.x86_64.rpm glibc-headers-2.17-157.el7.x86_64.rpm glibc-utils-2.17-157.el7.x86_64.rpm nscd-2.17-157.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: glibc-debuginfo-2.17-157.el7.i686.rpm glibc-debuginfo-2.17-157.el7.x86_64.rpm glibc-debuginfo-common-2.17-157.el7.i686.rpm glibc-debuginfo-common-2.17-157.el7.x86_64.rpm glibc-static-2.17-157.el7.i686.rpm glibc-static-2.17-157.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: glibc-2.17-157.el7.src.rpm
x86_64: glibc-2.17-157.el7.i686.rpm glibc-2.17-157.el7.x86_64.rpm glibc-common-2.17-157.el7.x86_64.rpm glibc-debuginfo-2.17-157.el7.i686.rpm glibc-debuginfo-2.17-157.el7.x86_64.rpm glibc-debuginfo-common-2.17-157.el7.i686.rpm glibc-debuginfo-common-2.17-157.el7.x86_64.rpm glibc-devel-2.17-157.el7.i686.rpm glibc-devel-2.17-157.el7.x86_64.rpm glibc-headers-2.17-157.el7.x86_64.rpm

Read the Full Advisory


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2573-02
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2016:2573.html
Issue date: 2016-11-03

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 impactof Low. 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.

Topics%20covered

Topics Covered

security advisory security update Red Hat Enterprise Linux glibc low impact stack overflow

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - aarch64, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

971416 - Locale alias no_NO.ISO-8859-1 not working.

1027348 - sem_post/sem_wait race causing sem_post to return EINVAL

1064063 - Test suite failure: tst-mqueue5

1099235 - CVE-2015-5277 glibc: nss_files doesn't detect ERANGE problems correctly [rhel-7.3]

1140250 - Unexpected results from using posix_fallocate with nfs target

1211100 - ld.so crash when audit modules provide path

1211823 - iconv: missing support for HKSCS-2008 in BIG5-HKSCS in rhel7 glibc

1249102 - "monstartup: out of memory" on PPC64LE

1255822 - glibc: malloc may fall back to calling mmap prematurely if arenas are contended

1276631 - glibc: hide backtrace from tst-malloc-backtrace

1276753 - malloc: arena free list can become cyclic, increasing contention

1293976 - CVE-2015-5229 glibc: calloc() returns non-zero'ed memory [rhel-7.3.0]

1298354 - Backport test-skeleton.c conversions.

1305406 - invalid fastbin entry (free), missing glibc patch

1320596 - glibc: NULL pointer dereference in stub resolver with unconnectable name server addresses

1321866 - CVE-2016-3075 glibc: Stack overflow in nss_dns_getnetbyname_r

1335629 - aarch64: MINSIGSTKSZ is (much) too small

1335925 - glibc: Fix aarch64 ABI issues

1346397 - glibc: debug/tst-longjump_chk2 calls printf from a signal handler

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