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AUSCERT External Security Bulletin Redistribution
ESB-2019.0938
BIG-IP snmpd vulnerability CVE-2019-6606
22 March 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-6606
Reference: ESB-2019.0937
Original Bulletin:
https://support.f5.com/csp/article/K35209601
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K35209601:BIG-IP snmpd vulnerability CVE-2019-6606
Security Advisory
Original Publication Date: 22 Mar, 2019
Security Advisory Description
When processing certain SNMP requests with a request-id of 0, the snmpd process
may leak a small amount of memory. (CVE-2019-6606)
Impact
When a remote attacker exploits this vulnerability, the BIG-IP system may
consume excessive amounts of memory, which can result in a failover event.
Security Advisory Status
F5 Product Development has assigned ID 658557 (BIG-IP) to this vulnerability.
To determine if your product and version have been evaluated for this
vulnerability, refer to the Applies to (see versions) box. 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. For more information
about security advisory versioning, refer to K51812227: Understanding Security
Advisory versioning.
+-------------------+------+----------+----------+----------+------+----------+
| | |Versions |Fixes | |CVSSv3|Vulnerable|
|Product |Branch|known to |introduced|Severity |score^|component |
| | |be |in | |1 |or feature|
| | |vulnerable| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |14.x |14.0.0 |14.1.0 | | | |
| | | |14.0.0.3 | | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|AFM, Analytics, |13.x |13.0.0 - |13.1.1.4 | | | |
|APM, ASM, DNS, Edge| |13.1.1 | | | | |
|Gateway, FPS, GTM, +------+----------+----------+Medium |4.3 |snmpd |
|Link Controller, |12.x |12.1.0 - |12.1.4 | | | |
|PEM, | |12.1.3 | | | | |
|WebAccelerator) +------+----------+----------+ | | |
| |11.x |11.5.1 - |11.6.4 | | | |
| | |11.6.3 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
| |6.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
|BIG-IQ Centralized |5.x |None |Not |Not |None |None |
|Management | | |applicable|vulnerable| | |
| +------+----------+----------+ | | |
| |4.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
|BIG-IQ Cloud and |1.x |None |Not |Not |None |None |
|Orchestration | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow |2.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
| |5.x |None |Not | | | |
| | | |applicable|Not | | |
|Traffix SDC +------+----------+----------+vulnerable|None |None |
| |4.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
^1The CVSSv3 score link takes you to a resource outside of AskF5, and it is
possible that the document may be removed without our knowledge.
Security Advisory 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 Fixes introduced in 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.
Mitigation
To mitigate this vulnerability, you can restart the snmpd process when memory
consumption is high. To do so, perform the following procedure:
Impact of action: SNMP functionality is disrupted while the snmpd process
restarts.
1. Log in to the TMOS Shell (tmsh) by typing the following command:
tmsh
2. Restart the snmpd process by typing the following command:
restart /sys service snmpd
3. Verify that the service is running by typing the following command:
show /sys service snmpd
Output appears similar to the following example:
snmpd run (pid 22143) 8 seconds, 1 start
Supplemental Information
o K51812227: Understanding Security Advisory versioning
o K41942608: Overview of Security Advisory articles
o K4602: Overview of the F5 security vulnerability response policy
o K4918: Overview of the F5 critical issue hotfix policy
o K9502: BIG-IP hotfix and point release matrix
o K13123: Managing BIG-IP product hotfixes (11.x - 13.x)
o K167: Downloading software and firmware from F5
o K9970: Subscribing to email notifications regarding F5 products
o K9957: Creating a custom RSS feed to view new and updated documents
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