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AUSCERT External Security Bulletin Redistribution
ESB-2019.3056
BIG-IP DHCPv6 vulnerability CVE-2019-6643
12 August 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-6643
Original Bulletin:
https://support.f5.com/csp/article/K36228121
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K36228121: BIG-IP DHCPv6 vulnerability CVE-2019-6643
Security Advisory
Original Publication Date: 09 Aug, 2019
Security Advisory Description
An attacker sending specifically crafted DHCPv6 requests through a BIG-IP
virtual server configured with a DHCPv6 profile may be able to cause the
Traffic Management Microkernel (TMM) process to produce a core file. (
CVE-2019-6643)
Impact
This vulnerability may allow an attacker who can route DHCPv6 requests to the
BIG-IP system to cause a remote denial of service (DoS) on the BIG-IP system.
If configured in a high-availability (HA) pair, the active BIG-IP device fails
over to the standby BIG-IP device.
Security Advisory Status
F5 Product Development has assigned ID 726393 (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 or |
| | |be |in | | |feature |
| | |vulnerable| | | | |
+---------------+------+----------+----------+----------+------+--------------+
| |15.x |None |15.0.0 | | | |
| +------+----------+----------+ | | |
|BIG-IP (LTM, |14.x |14.1.0 |14.1.0.6 | | |DHCPv6 virtual|
|AAM, AFM, | |14.0.0 |14.0.0.5 | | |servers that |
|Analytics, APM,+------+----------+----------+ | |respond to |
|ASM, DNS, Edge |13.x |13.0.0 - |13.1.3 | | |relayed |
|Gateway, FPS, | |13.1.1 | |High |7.5* |requests from |
|GTM, Link +------+----------+----------+ | |adjacent |
|Controller, |12.x |12.1.0 - |12.1.5 | | |untrusted |
|PEM, | |12.1.4 | | | |networks |
|WebAccelerator)+------+----------+----------+ | | |
| |11.x |11.5.2 - |None | | | |
| | |11.6.4 | | | | |
+---------------+------+----------+----------+----------+------+--------------+
| |15.x |None |15.0.0 | | | |
| +------+----------+----------+ | | |
|BIG-IP (LTM, |14.x |14.1.0 |14.1.0.6 | | |DHCPv6 virtual|
|AAM, AFM, | |14.0.0 |14.0.0.5 | | |servers that |
|Analytics, APM,+------+----------+----------+ | |respond only |
|ASM, DNS, Edge |13.x |13.0.0 - |13.1.3 | | |to local |
|Gateway, FPS, | |13.1.1 | |Medium |6.5** |requests from |
|GTM, Link +------+----------+----------+ | |non-adjacent |
|Controller, |12.x |12.1.0 - |12.1.5 | | |trusted |
|PEM, | |12.1.4 | | | |networks |
|WebAccelerator)+------+----------+----------+ | | |
| |11.x |11.5.2 - |None | | | |
| | |11.6.4 | | | | |
+---------------+------+----------+----------+----------+------+--------------+
|Enterprise |3.x |None |Not |Not |None |None |
|Manager | | |applicable|vulnerable| | |
+---------------+------+----------+----------+----------+------+--------------+
| |6.x |None |Not | | | |
|BIG-IQ | | |applicable|Not | | |
|Centralized +------+----------+----------+vulnerable|None |None |
|Management |5.x |None |Not | | | |
| | | |applicable| | | |
+---------------+------+----------+----------+----------+------+--------------+
|F5 iWorkflow |2.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+---------------+------+----------+----------+----------+------+--------------+
|Traffix SDC |5.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+---------------+------+----------+----------+----------+------+--------------+
*A relayed DHCPv6 request from an external untrusted network.
**A local DHCPv6 request from a non-relayed adjacent network.
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
None
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