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             AUSCERT External Security Bulletin Redistribution

                sol17378: SNMP vulnerability CVE-2015-5621
                              8 October 2015


        AusCERT Security Bulletin Summary

Product:           F5 products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Denial of Service               -- Remote/Unauthenticated
                   Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-5621  

Reference:         ESB-2015.2141

Original Bulletin: 

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sol17378: SNMP vulnerability CVE-2015-5621 

Security Advisory

Original Publication Date: 10/07/2015


The snmp_pdu_parse function in snmp_api.c in net-snmp 5.7.2 and earlier does 
not remove the varBind variable in a netsnmp_variable_list item when parsing 
of the SNMP PDU fails, which allows remote attackers to cause a denial of 
service (crash) and possibly execute arbitrary code via a crafted packet. 


A remote, unauthenticated attacker could use this flaw to interrupt the snmpd
process, or potentially execute arbitrary code on the system with the 
privileges of the user running the snmpd process. In default BIG-IP, BIG-IQ, 
and Enterprise Manager configurations, the data plane is not exposed to this 
vulnerability; however the control plane has remote exposure to this 
vulnerability because SNMP is enabled on the management network interface by 


F5 Product Development has assigned ID 540767 (BIG-IP), ID 548810 (BIG-IQ), ID
548812 (Enterprise Manager), ID 475753 (FirePass), LRS-60336 (LineRate), 
INSTALLER-1836 (Traffix), and ID 545965 (ARX) 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 

Product 		Versions known to be vulnerable 	Versions known to be not vulnerable 	Severity 	Vulnerable component or feature

BIG-IP LTM 		12.0.0 
			11.0.0 - 11.6.0 
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP AAM 		12.0.0 
			11.4.0 - 11.6.0 			None 					High 		SNMP

BIG-IP AFM 		12.0.0 
			11.3.0 - 11.6.0 			None 					High 		SNMP

BIG-IP Analytics 	12.0.0 
			11.0.0 - 11.6.0 			None 					High 		SNMP

BIG-IP APM 		12.0.0 
			11.0.0 - 11.6.0 
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP ASM 		12.0.0 
			11.0.0 - 11.6.0 		
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP DNS 		12.0.0 					None 					High 		SNMP

BIG-IP Edge Gateway 	11.0.0 - 11.3.0 
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP GTM 		11.0.0 - 11.6.0 
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP Link Controller 	12.0.0 
			11.0.0 - 11.6.0 
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP PEM 		12.0.0 
			11.3.0 - 11.6.0 			None 					High 		SNMP

BIG-IP PSM 		11.0.0 - 11.4.1 
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP WebAccelerator 	11.0.0 - 11.3.0 
			10.1.0 - 10.2.4 			None 					High 		SNMP

BIG-IP WOM 		11.0.0 - 11.3.0 
			10.1.0 - 10.2.4 			None 					High 		SNMP

ARX 			6.0.0 - 6.4.0 				None 					Medium 		SNMP

Enterprise Manager 	3.0.0 - 3.1.1 				None 					High 		SNMP

FirePass 		7.0.0 	
			6.0.0 - 6.1.0 				None 					Medium 		SNMP

BIG-IQ Cloud 		4.0.0 - 4.5.0 				None 					High 		SNMP

BIG-IQ Device 		4.2.0 - 4.5.0 				None 					High 		SNMP

BIG-IQ Security 	4.0.0 - 4.5.0 				None 					High 		SNMP

BIG-IQ ADC 		4.5.0 					None 					High 		SNMP

LineRate 		2.5.0 - 2.6.1 				None 					High 		SNMP

F5 WebSafe 		None 					1.0.0 					Not vulnerable 	None

Traffix SDC 		4.0.0 - 4.4.0 
			3.3.2 - 3.5.1 				None 					Medium 		SNMP

Recommended Action

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.

To mitigate this vulnerability, you can disable the SNMP service on the 
affected F5 products. Alternatively, you can implement access control on the 
network interface of the affected F5 products where the SNMP service is 
exposed. For information about implementing access control on the BIG-IP and 
Enterprise Manager systems, refer to the following articles:

    SOL13535: Restricting SNMP access to the BIG-IP system

    SOL13092: Overview of securing access to the BIG-IP system

Supplemental Information

    SOL9970: Subscribing to email notifications regarding F5 products

    SOL9957: Creating a custom RSS feed to view new and updated documents

    SOL4918: Overview of the F5 critical issue hotfix policy

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