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AUSCERT External Security Bulletin Redistribution
ESB-2016.0115
sol00032124: BIG-IP last hop kernel module vulnerability CVE-2015-5516
15 January 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP
F5 Enterprise Manager
Operating System: Network Appliance
Virtualisation
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-5516
Original Bulletin:
https://support.f5.com/kb/en-us/solutions/public/k/00/sol00032124.html
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sol00032124: BIG-IP last hop kernel module vulnerability CVE-2015-5516
Security Advisory
Original Publication Date: 01/14/2016
Updated Date: 01/14/2016
Vulnerability Description
The BIG-IP last hop kernel module may leak memory when processing User
Datagram Protocol (UDP) traffic. The memory leak may cause denial-of-service
(DoS) conditions for the BIG-IP system.
Impact
The following configurations may allow a remote attacker to cause a memory
leak and potential DoS conditions on BIG-IP systems:
You use the management interface to provide remote access to UDP based
services.
You use self IP addresses to provide remote access to UDP based services.
Virtual servers that reference a DNS profile with the Use BIND Server on
BIG-IP option enabled (the option is enabled by default in BIG-IP 11.2.x
through 12.0.0).
Wide IPs reference either of the following pool configurations:
A pool using the Return to DNS load balancing method.
A pool in which the Alternate and Fallback load balancing methods are set to
None and all pools associated with the wide IP are unavailable.
Security Issue Status
F5 Product Development has assigned ID 530829 (BIG-IP) and ID 540596 (BIG-IQ
and Enterprise Manager) to this vulnerability, and has evaluated the currently
supported releases for potential 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 Severity Vulnerable component or feature
BIG-IP LTM 11.0.0 - 11.6.0 12.0.0 Severe last hop kernel module
10.1.0 - 10.2.4 11.6.0 HF6
11.5.3 HF2
11.2.1 HF15
10.2.4 HF13
BIG-IP AAM 11.4.0 - 11.6.0 12.0.0 Severe last hop kernel module
11.6.0 HF6
11.5.3 HF2
10.2.4 HF13
BIG-IP AFM 11.3.0 - 11.6.0 12.0.0 Severe last hop kernel module
11.6.0 HF6
11.5.3 HF2
BIG-IP Analytics 11.0.0 - 11.6.0 12.0.0 Severe last hop kernel module
11.6.0 HF6
11.5.3 HF2
11.2.1 HF15
BIG-IP APM 11.0.0 - 11.6.0 12.0.0 Severe last hop kernel module
10.1.0 - 10.2.4 11.6.0 HF6
11.5.3 HF2
11.2.1 HF15
BIG-IP ASM 11.0.0 - 11.6.0 12.0.0 Severe last hop kernel module
10.1.0 - 10.2.4 11.6.0 HF6
11.5.3 HF2
11.2.1 HF15
BIG-IP DNS None 12.0.0 Not vulnerable None
BIG-IP Edge Gateway 11.0.0 - 11.3.0 11.2.1 HF15 Severe last hop kernel module
10.1.0 - 10.2.4 10.2.4 HF13
BIG-IP GTM 11.0.0 - 11.6.0 11.6.0 HF6 Severe last hop kernel module
10.1.0 - 10.2.4 11.5.3 HF2
11.2.1 HF15
10.2.4 HF13
BIG-IP Link Controller 11.0.0 - 11.6.0 12.0.0 Severe last hop kernel module
10.1.0 - 10.2.4 11.6.0 HF6
11.5.3 HF2
11.2.1 HF15
10.2.4 HF13
BIG-IP PEM 11.3.0 - 11.6.0 12.0.0 Severe last hop kernel module
11.6.0 HF6
11.5.3 HF2
BIG-IP PSM 11.0.0 - 11.4.1 11.4.1 HF Severe last hop kernel module
10.1.0 - 10.2.4 11.2.1 HF15
10.2.4 HF13
BIG-IP WebAccelerator 11.0.0 - 11.3.0 11.2.1 HF15 Severe last hop kernel module
10.1.0 - 10.2.4 10.2.4 HF13
BIG-IP WOM 11.0.0 - 11.3.0 11.2.1 HF15 Severe last hop kernel module
10.1.0 - 10.2.4 10.2.4 HF13
ARX None 6.0.0 - 6.4.0 Not vulnerable None
Enterprise Manager 3.0.0 - 3.1.1 None Severe last hop kernel module
FirePass None None Not vulnerable None
BIG-IQ Cloud 4.0.0 - 4.5.0 None Severe last hop kernel module
BIG-IQ Device 4.2.0 - 4.5.0 None Severe last hop kernel module
BIG-IQ Security 4.0.0 - 4.5.0 None Severe last hop kernel module
BIG-IQ ADC 4.5.0 None Severe last hop kernel module
LineRate None 2.5.0 - 2.6.1 Not vulnerable None
F5 WebSafe None 1.0.0 Not vulnerable None
Traffix SDC None 4.0.0 - 4.4.0 Not vulnerable None
3.3.2 - 3.5.1
Vulnerability Recommended Actions
If you are running a version listed in the Versions known to be vulnerable
column, you can eliminate this vulnerability by upgrading to a version listed
in the Versions known to be not vulnerable column. If the table lists only an
older version than what you are currently running, or does not list a
non-vulnerable version, then no upgrade candidate currently exists.
F5 responds to vulnerabilities in accordance with the Severity values
published in the previous table. The Severity values and other security
vulnerability parameters are defined in SOL4602: Overview of the F5 security
vulnerability response policy.
Mitigating this vulnerability
To mitigate this vulnerability, you should consider the following
recommendations:
Permit management access to F5 products only over a secure network, and limit
shell access to only trusted users. For more information about securing access
to BIG-IP/Enterprise Manager systems, refer to SOL13309: Restricting access to
the Configuration utility by source IP address (11.x - 12.x) and SOL13092:
Overview of securing access to the BIG-IP system.
Filter UDP traffic to the potentially impacted services by using an upstream
firewall.
Configure the port lockdown feature to disallow unneeded UDP ports all self IP
addresses. For more information, refer to SOL13250: Overview of port lockdown
behavior (10.x - 11.x) or SOL17333: Overview of port lockdown behavior (12.x).
Supplemental Information
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 - 12.x)
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