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AUSCERT Security Bulletin
ASB-2014.0111
GNU Bash Shellshock command injection vulnerabilities in Blue Coat products
30 September 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: Blue Coat Director
Blue Coat Content Analysis System
Blue Coat Malware Analysis Appliance
Blue Coat Analyzer G2
Blue Coat Management Centre
Blue Coat Security Analytics Platform
Blue Coat X-Series XOS
Blue Coat PacketShaper S-Series
Blue Coat SSL Visibility
Operating System: Network Appliance
VMware ESX Server
Windows
Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-7187 CVE-2014-7186 CVE-2014-7169
CVE-2014-6278 CVE-2014-6277 CVE-2014-6271
Member content until: Thursday, October 30 2014
Reference: https://kb.bluecoat.com/index?page=content&id=SA82
OVERVIEW
Multiple vulnerabilities have been discovered in Blue Coat products
using GNU Bash.
Blue Coat warns "A remote attacker may exploit the flaws to execute
arbitrary code with elevated privileges or cause a denial of
service." [1]
IMPACT
The vendor provides the following information regarding the impact
of these vulnerabilities:
CVE-2014-6271, CVE-2014-6277,CVE-2014-6278, and CVE-2014-7169: "are
command injection flaws in the bash command interpreter. An attacker
could use these flaws to create specially crafted environment
variables that override or bypass environment restrictions to
execute shell commands with elevated privileges." [1]
CVE-2014-7186 and CVE-2014-7187:
"are vulnerabilities discovered during the analysis of GNU Bash that
an attacker could use to cause a denial of service, and possibly execute
code with elevated privileges. These vulnerabilities are still under
investigation." [1]
"Blue Coat products that install GNU Bash, and that do not provide
additional protections against command injection through environment
variables, are vulnerable.
PacketShaper S-Series includes a vulnerable version of bash.
However, the product is not vulnerable to any known vectors of
attack. The S-Series does not use Apache services, mod_CGI,
mod_cgid, PHP, or DHCP. And, the shell that is available to
administrators is a custom shell that accepts only limited commands.
As other vectors of attack may be forthcoming, customers are
encouraged to upgrade to the latest release that addresses the
vulnerabilities in bash.
SSL Visibility includes a vulnerable version of bash. However, the
product is not vulnerable to any known vectors of attack. The web
server does not utilize CGI or Apache services. The DHCP client
sanitizes DHCP server responses. SSH access is restricted to
authenticated users. And, there is no general purpose user shell
that is accessible. As other vectors of attack may be forthcoming,
customers are encouraged to upgrade to the latest release that
addresses the vulnerabilities in bash.
X-Series customers running Check Point applications should contact
Check Point directly regarding a resolution to CVE-2014-6271.
Additional information can be found in the secure knowledge base
under sk102673." [1]
Blue Coat warns the following products are vulnerable:
"Director (Director 6.x and 5.x)
Content Analysis System (CAS 1.x)
Malware Analysis Appliance (MAA 1.1.x and 4.1.x)
Malware Analyzer G2 (All versions)
Management Center (1.1 and 1.2)
Reporter (ISO virtualized Reporter 9.4)
Security Analytics Platform (SA 7.1, 7.0, and 6.x)
X-Series XOS (All verions)
The following products contain a vulnerable version of bash, but are
not vulnerable to known vectors of attack:
PacketShaper S-Series
All versions of the S-Series have a vulnerable version of bash.
SSL Visibility
All versions of SSL Visibility have a vulnerable version of bash." [1]
MITIGATION
The vendor has provided the following information regarding patches:
"Fixes provided below address CVE-2014-6271 and CVE-2014-7169.
CVE-2014-6277, CVE-2014-6278, CVE-2014-7186 and CVE-2014-7187 are
still under investigation and may or may not be addressed by the
fixes below. More information will be provided as the investigation
continues.
Content Analysis System (CAS 1.1) - a fix is not yet available.
Director (6.1) - a fix is not yet available.
Director (5.5) - patch will not be provided. Please upgrade to the
latest Director release with the vulnerabilty fix.
Malware Analysis Appliance (MAA 4.1) - a fix is not yet available.
Malware Analyzer G2 (MAG2 4.1 and prior) - a patch will not be provided.
Please upgrade to the latest MAA 4.x release with the vulnerability fix.
Management Center (1.2) - a fix is not yet available.
Management Center (1.1) - a patch will not be provided. Please upgrade
to the latest Management Center release with the vulnerability fix.
PacketShaper S-Series (11.1) - a fix is not yet available.
Reporter (9.4) - a fix is not yet available.
Security Analytics Platform (SA 7.1) - a fix is not yet available.
(SA 7.0) - a fix is not yet available.
(SA 6.6) - a fix is not yet available.
(SA 6.0) - a fix is not yet available.
SSL Visibility (3.8) - a fix is not yet available.
(3.7 and earlier) - a patch will not be provided.
Please upgrade to the latest SSL Visibility release with the
vulnerability fix.
X-Series (10.0) - a fix is available in 10.0.2.0 and later.
(9.7) - a fix is available in 9.7.5.0 and later.
(9.6) - a fix is available in 9.6.9.0 and later.
(9.5) - a fix is not yet available.
(prior to 9.5) - a patch will not be provided.
Please upgrade to the latest XOS release with the vulnerability fix." [1]
REFERENCES
[1] September 25, 2014 - GNU Bash Shellshock command injection
vulnerabilities
https://kb.bluecoat.com/index?page=content&id=SA82
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
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Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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