CentOS 7 : glibc (CESA-2018:0805)

critical Nessus Plugin ID 109371
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote CentOS host is missing one or more security updates.

Description

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 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.

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.

Solution

Update the affected glibc packages.

See Also

http://www.nessus.org/u?d2876042

Plugin Details

Severity: Critical

ID: 109371

File Name: centos_RHSA-2018-0805.nasl

Version: 1.6

Type: local

Agent: unix

Published: 4/27/2018

Updated: 12/31/2019

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2014-9402

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:o:centos:centos:7:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:glibc:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:glibc-common:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:glibc-devel:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:glibc-headers:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:glibc-utils:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:nscd:*:*:*:*:*:*:*, p-cpe:2.3:a:centos:centos:glibc-static:*:*:*:*:*:*:*

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/26/2018

Vulnerability Publication Date: 2/24/2015

Exploitable With

Metasploit (glibc "realpath()" Privilege Escalation)

Reference Information

CVE: CVE-2018-1000001, CVE-2017-15670, CVE-2017-15804, CVE-2017-12132, CVE-2015-5180, CVE-2014-9402

RHSA: 2018:0805