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AUSCERT External Security Bulletin Redistribution
ESB-2018.2081
K48224824:BIG-IP DNS Cache vulnerability CVE-2018-5532
19 July 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 BIG-IP products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2018-5535
Original Bulletin:
https://support.f5.com/csp/article/K48224824
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K48224824:BIG-IP DNS Cache vulnerability CVE-2018-5532
Security Advisory
Original Publication Date: 19 Jul, 2018
Security Advisory Description
A domain name cached within the DNS Cache of TMM may continue to be resolved
by the cache even after the parent server revokes the record, if the DNS Cache
is receiving a stream of requests for the cached name. (CVE-2018-5532)
Impact
The BIG-IP system may continue to serve responses from the DNS Cache for as
long as the system receives requests for the cached name, even though the
authoritative nameserver removed the name.
Security Advisory Status
F5 Product Development has assigned ID 582773 (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| | | | |
+------------------+------+----------+----------+----------+------+----------+
| |13.x |13.0.0 |13.1.0 | | | |
|BIG-IP (LTM, AAM, | | |13.0.0 HF1| | | |
|AFM, Analytics, +------+----------+----------+ | | |
|APM, ASM, DNS, |12.x |12.1.0 - |12.1.3 | | | |
|Edge Gateway, FPS,| |12.1.2 | |Medium |5.3 |DNS Cache |
|GTM, Link +------+----------+----------+ | | |
|Controller, PEM, | |11.6.1 - | | | | |
|WebAccelerator) |11.x |11.6.3 |11.6.3.2 | | | |
| | |11.2.1 - |11.5.7 | | | |
| | |11.5.6 | | | | |
+------------------+------+----------+----------+----------+------+----------+
|ARX |6.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+------------------+------+----------+----------+----------+------+----------+
|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| | |
+------------------+------+----------+----------+----------+------+----------+
|LineRate |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| | | |
+------------------+------+----------+----------+----------+------+----------+
^1 The 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
None
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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