Scientific Linux Security Update : bash on SL5.x, SL6.x i386/x86_64 (Shellshock)

Critical Nessus Plugin ID 77956


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


It was found that the fix for CVE-2014-6271 was incomplete, and Bash still allowed certain characters to be injected into other environments via specially crafted environment variables. An attacker could potentially use this flaw to override or bypass environment restrictions to execute shell commands. Certain services and applications allow remote unauthenticated attackers to provide environment variables, allowing them to exploit this issue.

Applications which directly create bash functions as environment variables need to be made aware of changes to the way names are handled by this update.

Note: Docker users are advised to use 'yum update' within their containers, and to commit the resulting changes.

For additional information on CVE-2014-6271 and CVE-2014-7169, refer to crafted-environment-variables-code-injection-attack/


Update the affected bash, bash-debuginfo and / or bash-doc packages.

See Also

Plugin Details

Severity: Critical

ID: 77956

File Name: sl_20140926_bash_on_SL5_x.nasl

Version: $Revision: 1.10 $

Type: local

Agent: unix

Published: 2014/09/29

Modified: 2015/12/03

Dependencies: 12634

Risk Information

Risk Factor: Critical


Base Score: 10

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

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2014/09/26

Exploitable With

Core Impact

Metasploit (Apache mod_cgi Bash Environment Variable Code Injection (Shellshock))

Reference Information

CVE: CVE-2014-6271, CVE-2014-7169

IAVA: 2014-A-0142