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AUSCERT External Security Bulletin Redistribution
ESB-2014.1472
sol15236: ConfigSync-IP Rsync full file system access vulnerability
29 August 2014
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Unauthorised Access -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2014-2927
Original Bulletin:
http://support.f5.com/kb/en-us/solutions/public/15000/200/sol15236.html
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sol15236: ConfigSync-IP Rsync full file system access vulnerability
CVE-2014-2927
Security Advisory
Original Publication Date: 08/28/2014
Description
An open Rsync configuration for the ConfigSync IP address allows for remote
read/write file system access in BIG-IP 11.x versions before 11.6.0, 11.5.1
HF3, 11.5.0 HF4, 11.4.1 HF, 11.4.0 HF7, 11.3.0 HF9, and 11.2.1 HF11, and
Enterprise Manager 3.x versions before 3.1.1 HF2.
Impact
A remote unauthenticated user may be allowed full read/write access to the
file system.
Status
F5 Product Development has assigned ID 458676 (BIG-IP) and ID 458827
(Enterprise Manager) to this vulnerability.
To determine if your release is known to be vulnerable, the components or
features that are affected by the vulnerability, and for information about
releases or hotfixes that address the vulnerability, refer to the following
table:
Product Versions known to be vulnerable Versions known to be not vulnerable Vulnerable component or feature
BIG-IP LTM 11.0.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP AAM 11.4.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7 Rsync over the ConfigSync self IP address
BIG-IP AFM 11.3.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9 Rsync over the ConfigSync self IP address
BIG-IP
Analytics 11.0.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9
11.2.1 HF11 Rsync over the ConfigSync self IP address
BIG-IP APM 11.0.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP ASM 11.0.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP Edge
Gateway 11.0.0 - 11.3.0 11.3.0 HF9
11.2.1 HF11
10.1.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP GTM 11.0.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP Link
Controller 11.0.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP PEM 11.3.0 - 11.5.1 11.6.0
11.5.1 HF3
11.5.0 HF4
11.4.1 HF4
11.4.0 HF7
11.3.0 HF9 Rsync over the ConfigSync self IP address
BIG-IP PSM 11.0.0 - 11.4.1 11.4.1 HF4
11.4.0 HF7
11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP
WebAccelerator 11.0.0 - 11.3.0 11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
BIG-IP WOM 11.0.0 - 11.3.0 11.3.0 HF9
11.2.1 HF11
10.0.0 - 10.2.4 Rsync over the ConfigSync self IP address
Enterprise
Manager 3.0.0 - 3.1.1 3.1.1 HF2
2.1.0 - 2.3.0 Rsync over the ConfigSync self IP address
Recommended Action
If the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to the
listed version. If the table does not list any version in the column, then no
upgrade candidate currently exists.
To mitigate this vulnerability, you should ensure the IP address used for
ConfigSync is on a trusted network. Additionally, you should ensure TCP port
873 (tcp:873 or tcp:rsync) is disabled on self IP addresses. To do so, perform
both of the following procedures:
Ensure TCP port 873 is not allowed as a default service (allow-service
default)
Ensure your ConfigSync self IP is not configured with a Port Lockdown
setting of Allow All (allow-service all) and does not specifically have TCP
port 873 (tcp:rsync) enabled
Ensure TCP port 873 is not allowed as a default service (allow-service
default)
Impact of procedure: Performing the following procedure should not have a
negative impact on your system.
Log in to the Traffic Management Shell (tmsh) by typing the following
command:
tmsh
List the default services allowed by the allow-service default setting by
typing the following command:
list net self-allow
Output appears similar to the following example:
net self-allow {
defaults {
ospf:any
tcp:domain
tcp:f5-iquery
tcp:https
tcp:snmp
tcp:ssh
udp:520
udp:cap
udp:domain
udp:f5-iquery
udp:snmp
}
}
If TCP port 873 (tcp:873 or tcp:rsync) is listed as a default allowed
port, you should delete the entry by typing the following command:
modify net self-allow defaults delete { tcp:rsync }
Save the configuration by typing the following command:
save sys config
Ensure your ConfigSync self IP is not configured with a Port Lockdown setting
of Allow All (allow-service all) and does not specifically have TCP port 873
(tcp:rsync) enabled
Impact of procedure: Performing the following procedure should not have a
negative impact on your system.
Log in to the BIG-IP or Enterprise Manager Configuration utility.
Navigate to Device Management > Devices.
Select the device indicated as (Self).
Navigate to Device Connectivity > ConfigSync.
Note the IP address listed in Local Address.
Navigate to Network > Self IPs.
Click the self IP address that matches the Local Address from step 5.
Ensure the Port Lockdown setting is not set to Allow All, or Allow Custom
with TCP port 873 (Rsync) added to the Custom List of allowed ports.
For example, either delete TCP port 873 from the Custom List of allowed
ports, or select Allow Default from the Port Lockdown menu.
Click Update to save the configuration.
Acknowledgments
F5 would like to acknowledge Thomas Hibbert of Security Assessment for
bringing this issue to our attention, and for following the highest standards
of responsible disclosure.
Supplemental Information
CVE-2014-2927
SOL9970: Subscribing to email notifications regarding F5 products
SOL9957: Creating a custom RSS feed to view new and updated documents.
SOL4602: Overview of the F5 security vulnerability response policy
SOL4918: Overview of the F5 critical issue hotfix policy
SOL167: Downloading software and firmware from F5
SOL13123: Managing BIG-IP product hotfixes (11.x)
SOL9502: BIG-IP hotfix matrix
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