Scientific Linux Security Update : glibc on SL6.x i386/x86_64

Medium Nessus Plugin ID 82987


The remote Scientific Linux host is missing one or more security updates.


A buffer overflow flaw was found in the way glibc's gethostbyname_r() and other related functions computed the size of a buffer when passed a misaligned buffer as input. An attacker able to make an application call any of these functions with a misaligned buffer could use this flaw to crash the application or, potentially, execute arbitrary code with the permissions of the user running the application.

It was discovered that, under certain circumstances, glibc's getaddrinfo() function would send DNS queries to random file descriptors. An attacker could potentially use this flaw to send DNS queries to unintended recipients, resulting in information disclosure or data loss due to the application encountering corrupted data.

This update also fixes the following bug :

- Previously, the nscd daemon did not properly reload modified data when the user edited monitored nscd configuration files. As a consequence, nscd returned stale data to system processes. This update adds a system of inotify-based monitoring and stat-based backup monitoring for nscd configuration files. As a result, nscd now detects changes to its configuration files and reloads the data properly, which prevents it from returning stale data.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 82987

File Name: sl_20150421_glibc_on_SL6_x.nasl

Version: $Revision: 1.2 $

Type: local

Agent: unix

Published: 2015/04/22

Modified: 2015/09/30

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.8

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

Vulnerability Information

CPE: x-cpe:/o:fermilab:scientific_linux

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

Patch Publication Date: 2015/04/21

Reference Information

CVE: CVE-2013-7423, CVE-2015-1781