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AUSCERT External Security Bulletin Redistribution
ESB-2018.1354
TMOS Shell vulnerability
3 May 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-5516
Original Bulletin:
https://support.f5.com/csp/article/K37442533
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K37442533: TMOS Shell vulnerability CVE-2018-5516
Security Advisory
Original Publication Date: May 01, 2018
Updated Date: May 03, 2018
Security Advisory Description
Authenticated users granted TMOS Shell (tmsh) access can access objects on the
file system which would normally be disallowed by tmsh restrictions. This
allows for authenticated, low privileged attackers to exfiltrate objects on the
file system which should not be allowed. (CVE-2018-5516)
Impact
This vulnerability allows unauthorized privileges to authenticated
administrative users with tmsh access.
Security Advisory Status
F5 Product Development has assigned ID 632875 (BIG-IP), ID 709043 (BIG-IQ), and
ID 709042 (Enterprise Manager) 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.
+-------------------+------+----------+----------+----------+------+----------+
| | |Versions |Fixes | |CVSSv3|Vulnerable|
|Product |Branch|known to |introduced|Severity |score^|component |
| | |be |in | |1 |or feature|
| | |vulnerable| | | | |
+-------------------+------+----------+----------+----------+------+----------+
|BIG-IP (LTM, AAM, |13.x |13.0.0 - |13.1.0.6 | | | |
|AFM, Analytics, | |13.1.0 |13.0.1 | | | |
|APM, ASM, DNS, Edge+------+----------+----------+ | | |
|Gateway, GTM, Link |12.x |12.1.0 - |12.1.3 |Low |3.3 |tmsh |
|Controller, PEM, | |12.1.2 | | | | |
|WebAccelerator, +------+----------+----------+ | | |
|WebSafe) |11.x |11.2.1 - |None | | | |
| | |11.6.3 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|ARX |6.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x |3.1.1 |None |Low |3.3 |tmsh |
+-------------------+------+----------+----------+----------+------+----------+
| |5.x |5.0.0 - |None | | | |
|BIG-IQ Centralized | |5.4.0 | |Low |3.3 |tmsh |
|Management +------+----------+----------+ | | |
| |4.x |4.6.0 |None | | | |
+-------------------+------+----------+----------+----------+------+----------+
|BIG-IQ Cloud and |1.x |1.0.0 |None |Low |3.3 |tmsh |
|Orchestration | | | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|F5 iWorkflow |2.x |2.0.2 - |None |Low |3.3 |tmsh |
| | |2.3.0 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
|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| | | |
+-------------------+------+----------+----------+----------+------+----------+
^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
There is no mitigation for this vulnerability. However, administrative users
that have only Configuration utility permissions are not able to exploit this
vulnerability.
Acknowledgements
F5 would like to acknowledge Carlo Beccaria for bringing this issue to our
attention and for following the highest standards of responsible disclosure.
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 K15106: Managing BIG-IQ product hotfixes
o K15113: BIG-IQ hotfix matrix
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
o K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems
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