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AUSCERT External Security Bulletin Redistribution
ESB-2020.2936
Certain iRulesLX binaries are installed with improper permissions
26 August 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP products
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
Original Bulletin:
https://support.f5.com/csp/article/K73302459
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K73302459: Certain iRulesLX binaries are installed with improper permissions
Security Advisory
Original Publication Date: 26 Aug, 2020
Security Advisory Description
Certain iRulesLX binaries are installed with improper permissions. This issue
occurs when the following condition is met:
o The affected system is provisioned with iRules Language Extensions (LX).
When you provision a system with iRulesLX, the system installs certain iRulesLX
binaries with improper permissions (the SUID bit set).
Impact
Certain iRulesLX binaries may be run with the SUID bit set, which may lead to a
privilege escalation; however, the binaries are not exploitable under the
standard recommended configuration.
Symptoms
As a result of this issue, you may encounter the following symptom:
o You attempt to search for binaries with the SUID bit set using the command
find / -type f \( -perm -4000 -o -perm -2000 \) in the command line, and
the system reports certain iRulesLX binaries with the SUID bit set.
Security Advisory Status
F5 Product Development has assigned ID 715032 to this issue. F5 has confirmed
that this issue exists in the products listed in the Applies to (see versions)
box, located in the upper-right corner of this article. For information about
releases, point releases, or hotfixes that resolve this issue, refer to the
following table.
+------------------+-----------------+----------------------------------------+
|Type of fix |Fixes introduced |Related articles |
| |in | |
+------------------+-----------------+----------------------------------------+
|Release |16.0.0 |K2200: Most recent versions of F5 |
| | |software |
+------------------+-----------------+----------------------------------------+
| |15.1.0.5 | |
|Point release/ |15.0.1.4 |K9502: BIG-IP hotfix and point release |
|hotfix |14.1.2.5 |matrix |
| |13.1.3.4 | |
| |12.1.5.2 | |
+------------------+-----------------+----------------------------------------+
Security Advisory Recommended Actions
Workaround
None
Supplemental Information
o K51812227: Understanding Security Advisory versioning
o K41942608: Overview of AskF5 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 - 16.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
o K16221101: Overview of iRules LX properties and limitations
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The University of Queensland
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