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             AUSCERT External Security Bulletin Redistribution

          GNU C library strxfrm/strcoll overflow vulnerabilities
                                4 June 2019


        AusCERT Security Bulletin Summary

Product:           F5 Products
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade

Original Bulletin: 

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K16416:GNU C library strxfrm/strcoll overflow vulnerabilities

Security Advisory

Original Publication Date: 24 Jul, 2015

Latest   Publication Date: 04 Jun, 2019

Security Advisory Description

o The GNU C (glibc) strxfrm() function is prone to a remote integer-overflow
    vulnerability that leads to buffer overflow vulnerability.
  o The GNU C (glibc) strcoll() function is prone to a stack-based
    buffer-overflow vulnerability.


A locally authenticated attacker could run code that exposes the security flaws
in glibc. The BIG-IP code contains the vulnerable functions; however, the
functions are not used in a manner that exposes the vulnerabilities in the
default configuration.

Security Advisory Status

F5 Product Development has assigned ID 510859 (BIG-IP), ID 515231 (BIG-IQ), and
ID 515232 (Enterprise Manager) to these vulnerabilities. Additionally, BIG-IP
iHealth may list Heuristic H515693 on the Diagnostics > Identified > Low page.

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     |        |CVSSv2|Vulnerable|
|Product              |Branch|known to  |introduced|Severity|score^|component |
|                     |      |be        |in        |        |1     |or feature|
|                     |      |vulnerable|          |        |      |          |
|                     |13.x  |None      |Not       |        |      |          |
|BIG-IP (LTM, AAM,    |      |          |applicable|        |      |          |
|AFM, Analytics, APM, +------+----------+----------+        |      |          |
|ASM, DNS, Edge       |12.x  |12.0.0    |12.1.0    |Medium  |2.6   |glibc     |
|Gateway, FPS, GTM,   |      |          |12.0.0 HF2|        |      |          |
|Link Controller, PEM,+------+----------+----------+        |      |          |
|WebAccelerator)      |11.x  |11.0.0 -  |None      |        |      |          |
|                     |      |11.6.4    |          |        |      |          |
|                     |3.x   |3.0.0 -   |None      |        |      |          |
|                     |      |3.1.1     |          |        |      |          |
|Enterprise Manager   +------+----------+----------+Medium  |2.6   |glibc     |
|                     |2.x   |2.1.0 -   |None      |        |      |          |
|                     |      |2.3.0     |          |        |      |          |
|                     |6.x   |None      |Not       |        |      |          |
|                     |      |          |applicable|        |      |          |
|BIG-IQ Centralized   +------+----------+----------+        |      |          |
|Management           |5.x   |5.0.0 -   |5.2.0     |Medium  |2.6   |glibc     |
|                     |      |5.1.0     |          |        |      |          |
|                     +------+----------+----------+        |      |          |
|                     |4.x   |4.6.0     |None      |        |      |          |
|F5 iWorkflow         |2.x   |2.0.0     |None      |Medium  |2.6   |glibc     |
|                     |4.x   |4.0.0 -   |None      |        |      |          |
|                     |      |4.1.0     |          |        |      |          |
|Traffix SDC          +------+----------+----------+Low     |None  |glibc     |
|                     |3.x   |3.3.2 -   |None      |        |      |          |
|                     |      |3.5.1     |          |        |      |          |

^1The CVSSv2 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 the previous table lists a version in the Versions known to be not
vulnerable column, you can eliminate this vulnerability by upgrading to the
listed version. If the listed version is older than the version you are
currently running, or if the table does not list any version in the column,
then no upgrade candidate currently exists.


To mitigate this vulnerability, you should permit management access to F5
products only over a secure network, and restrict command line access for
affected systems to trusted users. For more information, refer to K13309:
Restricting access to the Configuration utility by source IP address (11.x -
14.x) and K13092: Overview of securing access to the BIG-IP system.

Supplemental Information

o K9970: Subscribing to email notifications regarding F5 products
  o K9957: Creating a custom RSS feed to view new and updated documents
  o K4918: Overview of the F5 critical issue hotfix policy
  o K4602: Overview of the F5 security vulnerability response policy
  o K167: Downloading software and firmware from F5
  o K13123: Managing BIG-IP product hotfixes (11.x - 13.x)
  o K9502: BIG-IP hotfix and point release matrix

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