CentOS 7 : glibc (CESA-2014:2023)

medium Nessus Plugin ID 80123

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Synopsis

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

Description

Updated glibc packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.

The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard math libraries (libm), and the Name Server Caching Daemon (nscd) used by multiple programs on the system. Without these libraries, the Linux system cannot function correctly.

It was found that the wordexp() function would perform command substitution even when the WRDE_NOCMD flag was specified. An attacker able to provide specially crafted input to an application using the wordexp() function, and not sanitizing the input correctly, could potentially use this flaw to execute arbitrary commands with the credentials of the user running that application. (CVE-2014-7817)

This issue was discovered by Tim Waugh of the Red Hat Developer Experience Team.

This update also fixes the following bug :

* Prior to this update, if a file stream that was opened in append mode and its underlying file descriptor were used at the same time and the file was truncated using the ftruncate() function on the file descriptor, a subsequent ftell() call on the stream incorrectly modified the file offset by seeking to the new end of the file. This update ensures that ftell() modifies the state of the file stream only when it is in append mode and its buffer is not empty. As a result, the described incorrect changes to the file offset no longer occur.
(BZ#1170187)

All glibc users are advised to upgrade to these updated packages, which contain backported patches to correct these issues.

Solution

Update the affected glibc packages.

Plugin Details

Severity: Medium

ID: 80123

File Name: centos_RHSA-2014-2023.nasl

Version: 1.13

Type: local

Agent: unix

Family: CentOS Local Security Checks

Published: 12/22/2014

Updated: 1/4/2021

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.4

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

CVSS Score Source: CVE-2014-7817

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/19/2014

Vulnerability Publication Date: 11/24/2014

Reference Information

CVE: CVE-2014-7817

BID: 71216

RHSA: 2014:2023

Detections

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