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Red Hat Enterprise Linux 7 RHSA-2018-0805-01 Moderate: glibc Security Fix

red hat
Calendar Grey April 10, 2018
Scroller Redhat
A new version of glibc has been released for Red Hat Enterprise Linux 7 to resolve moderate security vulnerabilities and correct various bugs.
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):
* glibc: realpath() buffer underflow when getcwd() returns relative path allows privilege escalation (CVE-2018-1000001)
* glibc: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
* glibc: Buffer overflow during unescaping of user names with the ~ operator (CVE-2017-15804)
* glibc: denial of service in getnetbyname function (CVE-2014-9402)
* glibc: DNS resolver NULL pointer dereference with crafted record type (CVE-2015-5180)
* glibc: Fragmentation attacks possible when EDNS0 is enabled (CVE-2017-12132)
For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.
Red Hat would like to thank halfdog for reporting CVE-2018-1000001. The CVE-2015-5180 issue was discovered by Florian Weimer (Red Hat Product Security).
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.5 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory buffer overflow privilege escalation moderate impact red hat enterprise linux glibc fix

References

https://access.redhat.com/security/cve/CVE-2014-9402 https://access.redhat.com/security/cve/CVE-2015-5180 https://access.redhat.com/security/cve/CVE-2017-12132 https://access.redhat.com/security/cve/CVE-2017-15670 https://access.redhat.com/security/cve/CVE-2017-15804 https://access.redhat.com/security/cve/CVE-2018-1000001 https://access.redhat.com/security/updates/classification#moderate https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/7.5_release_notes/index.html

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: glibc-2.17-222.el7.src.rpm
x86_64: glibc-2.17-222.el7.i686.rpm glibc-2.17-222.el7.x86_64.rpm glibc-common-2.17-222.el7.x86_64.rpm glibc-debuginfo-2.17-222.el7.i686.rpm glibc-debuginfo-2.17-222.el7.x86_64.rpm glibc-debuginfo-common-2.17-222.el7.i686.rpm glibc-debuginfo-common-2.17-222.el7.x86_64.rpm glibc-devel-2.17-222.el7.i686.rpm glibc-devel-2.17-222.el7.x86_64.rpm glibc-headers-2.17-222.el7.x86_64.rpm glibc-utils-2.17-222.el7.x86_64.rpm nscd-2.17-222.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: glibc-debuginfo-2.17-222.el7.i686.rpm glibc-debuginfo-2.17-222.el7.x86_64.rpm glibc-debuginfo-common-2.17-222.el7.i686.rpm glibc-debuginfo-common-2.17-222.el7.x86_64.rpm glibc-static-2.17-222.el7.i686.rpm glibc-static-2.17-222.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: glibc-2.17-222.el7.src.rpm
x86_64: glibc-2.17-222.el7.i686.rpm glibc-2.17-222.el7.x86_64.rpm glibc-common-2.17-222.el7.x86_64.rpm glibc-debuginfo-2.17-222.el7.i686.rpm glibc-debuginfo-2.17-222.el7.x86_64.rpm glibc-debuginfo-common-2.17-222.el7.i686.rpm glibc-debuginfo-common-2.17-222.el7.x86_64.rpm glibc-devel-2.17-222.el7.i686.rpm glibc-devel-2.17-222.el7.x86_64.rpm glibc-headers-2.17-222.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:0805-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0805
Issue date: 2018-04-10

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 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.

Topics%20covered

Topics Covered

security advisory buffer overflow privilege escalation moderate impact red hat enterprise linux glibc fix

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) - ppc64, ppc64le, s390x, x86_64

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

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

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

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x

Bugs Fixed

677316 - glibc: Increase number of search domains supported by /etc/resolv.conf

1175369 - CVE-2014-9402 glibc: denial of service in getnetbyname function

1249603 - CVE-2015-5180 glibc: DNS resolver NULL pointer dereference with crafted record type

1348000 - glibc: tst-malloc-usable spurious test failure

1349962 - Hide reference to mktemp in libpthread.

1349964 - Fix build warning in locarchive.c

1372305 - glibc: fopencookie hardening

1398413 - glibc: backport libio vtable hardening

1432085 - glibc: Detect and apply /etc/resolv.conf changes in libresolv

1435615 - nscd is not caching ldap netgroup data properly, hangs on nscd -i netgroup

1440250 - elf/check-localplt test fails with binutils 2.27

1443236 - Applications encounter SIGSEGV when LD_LIBRARY_PATH LD_LIBRARY_PATH contains only non-existings paths

1445644 - ifuncmod1.so ifuncmod3.so ifuncmod5.so tests fail during "make check" with binutils 2.27

1445781 - elf/tst-audit set of tests fails with error "no PLTREL found in object ld-linux-x86-64.so.2"

1447556 - glibc: malloc: check for chunk_size == next->prev->chunk_size in unlink

1448822 - glibc: Add definition of CLOCK_TAI

1452034 - when the /etc/hosts file has a line longer than 1028 characters getent ahostsv4 and ahostsv6 will stop working.

1463692 - glibc: Incorrect pointer alignment in NSS group merge result construction

Read the Full Advisory

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