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RHEL 5 / 6 : glibc (RHSA-2015:0099) (GHOST)

high Nessus Plugin ID 81068

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Synopsis

The remote Red Hat host is missing one or more security updates.

Description

Updated glibc packages that fix one security issue are now available for Red Hat Enterprise Linux 5.6 Long Life, Red Hat Enterprise Linux 5.9 Extended Update Support, Red Hat Enterprise Linux 6.2 Advanced Update Support, and Red Hat Enterprise Linux 6.4 and 6.5 Extended Update Support.

Red Hat Product Security has rated this update as having Critical security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link 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.

A heap-based buffer overflow was found in glibc's
__nss_hostname_digits_dots() function, which is used by the gethostbyname() and gethostbyname2() glibc function calls. A remote attacker able to make an application call either of these functions could use this flaw to execute arbitrary code with the permissions of the user running the application. (CVE-2015-0235)

Red Hat would like to thank Qualys for reporting this issue.

All glibc users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue.

Solution

Update the affected packages.

See Also

https://access.redhat.com/errata/RHSA-2015:0099

https://access.redhat.com/security/cve/cve-2015-0235

Plugin Details

Severity: High

ID: 81068

File Name: redhat-RHSA-2015-0099.nasl

Version: 1.22

Type: local

Agent: unix

Published: 1/29/2015

Updated: 10/24/2019

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

Risk Information

VPR

Risk Factor: High

Score: 8.9

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.6

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

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:glibc-devel, p-cpe:/a:redhat:enterprise_linux:glibc-static, p-cpe:/a:redhat:enterprise_linux:glibc-utils, cpe:/o:redhat:enterprise_linux:5.9, p-cpe:/a:redhat:enterprise_linux:glibc, cpe:/o:redhat:enterprise_linux:6.2, p-cpe:/a:redhat:enterprise_linux:nscd, cpe:/o:redhat:enterprise_linux:6.4, cpe:/o:redhat:enterprise_linux:6.5, cpe:/o:redhat:enterprise_linux:5.6, p-cpe:/a:redhat:enterprise_linux:glibc-headers, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:glibc-debuginfo-common, p-cpe:/a:redhat:enterprise_linux:glibc-debuginfo, p-cpe:/a:redhat:enterprise_linux:glibc-common

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/28/2015

Vulnerability Publication Date: 1/28/2015

Exploitable With

Core Impact

Metasploit (Exim GHOST (glibc gethostbyname) Buffer Overflow)

Reference Information

CVE: CVE-2015-0235

RHSA: 2015:0099