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AUSCERT External Security Bulletin Redistribution
ESB-2015.2559
sol17378: SNMP vulnerability CVE-2015-5621
8 October 2015
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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:
https://support.f5.com/kb/en-us/solutions/public/17000/300/sol17378.html
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sol17378: SNMP vulnerability CVE-2015-5621
Security Advisory
Original Publication Date: 10/07/2015
Description
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.
(CVE-2015-5621)
Impact
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
default.
Status
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
table:
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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