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             AUSCERT External Security Bulletin Redistribution

               cURL and libcurl vulnerability CVE-2017-2628
                             22 February 2021


        AusCERT Security Bulletin Summary

Product:           BIG-IP
                   Enterprise Manager
                   F5 iWorkflow
                   Traffix SDC
Publisher:         F5 Networks
Operating System:  Network Appliance
Impact/Access:     Reduced Security -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-2628 CVE-2015-3148 

Reference:         ESB-2018.2229

Original Bulletin: 

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K35453761: cURL and libcurl vulnerability  CVE-2017-2628

Original Publication Date: 29 Mar, 2018
Latest   Publication Date: 19 Feb, 2021

Security Advisory Description

cURL, as shipped in Red Hat Enterprise Linux 6 before version 7.19.7-53, did
not correctly backport the fix for CVE-2015-3148 because it did not reflect the
fact that the HAVE_GSSAPI define was meanwhile substituted by
USE_HTTP_NEGOTIATE. This issue was introduced in RHEL 6.7 and affects RHEL 6
cURL only. (CVE-2017-2628)


An application using libcurl with HTTP Negotiate authentication can incorrectly
re-use credentials for subsequent requests to the same server.

Security Advisory Status

F5 Product Development has assigned ID 681535 (BIG-IP), ID 682158 (BIG-IQ),
ID 682153 (Enterprise Manager), ID 687002 (iWorkflow), and INSTALLER-3051
(Traffix) to this vulnerability. Additionally, BIG-IP iHealth may list
Heuristic H35453761 on the Diagnostics > Identified > Medium 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.

|                   |      |Versions  |Fixes     |          |CVSSv3|Vulnerable|
|Product            |Branch|known to  |introduced|Severity  |score^|component |
|                   |      |be        |in        |          |1     |or feature|
|                   |      |vulnerable|          |          |      |          |
|                   |13.x  |None      |Not       |          |      |          |
|                   |      |          |applicable|          |      |          |
|BIG-IP (LTM, AAM,  +------+----------+----------+          |      |          |
|AFM, Analytics,    |12.x  |12.1.0 -  |  |          |      |          |
|APM, ASM, DNS, Edge|      |12.1.5    |          |          |      |cURL and  |
|Gateway, GTM, Link +------+----------+----------+Medium    |4.8   |libcurl^2 |
|Controller, PEM,   |      |11.6.1 -  |          |          |      |          |
|WebAccelerator,    |      |11.6.3    |          |          |      |          |
|WebSafe)           |11.x  |11.5.1 -  |None      |          |      |          |
|                   |      |11.5.8    |          |          |      |          |
|                   |      |11.2.1    |          |          |      |          |
|ARX                |6.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|Enterprise Manager |3.x   |3.1.1     |None      |Medium    |4.8   |cURL and  |
|                   |      |          |          |          |      |libcurl   |
|                   |5.x   |5.0.0 -   |None      |          |      |          |
|BIG-IQ Centralized |      |5.4.0     |          |Medium    |4.8   |cURL and  |
|Management         +------+----------+----------+          |      |libcurl   |
|                   |4.x   |4.6.0     |None      |          |      |          |
|BIG-IQ Cloud and   |1.x   |1.0.0     |None      |Medium    |4.8   |cURL and  |
|Orchestration      |      |          |          |          |      |libcurl   |
|F5 iWorkflow       |2.x   |2.0.1 -   |None      |Medium    |4.8   |cURL and  |
|                   |      |2.3.0     |          |          |      |libcurl   |
|LineRate           |2.x   |None      |Not       |Not       |None  |None      |
|                   |      |          |applicable|vulnerable|      |          |
|                   |5.x   |5.0.0 -   |None      |          |      |          |
|                   |      |5.1.0     |          |          |      |cURL and  |
|Traffix SDC        +------+----------+----------+Low       |2.2   |libcurl   |
|                   |4.x   |4.0.5 -   |None      |          |      |          |
|                   |      |4.4.0     |          |          |      |          |

^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.

^2Exposure to the vulnerability is possible only using a non-standard
configuration; the cURL libraries and use of NTLM are not exposed in standard
BIG-IP monitors. Custom EAV monitors using cURL and NTLM may be prone to this

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.

To determine the necessary upgrade path for your BIG-IQ system, you should
understand the BIG-IQ product offering name changes. For more information,
refer to K21232150: Considerations for upgrading BIG-IQ or F5 iWorkflow systems



Supplemental Information

o K16707: cURL and libcurl vulnerability CVE-2015-3148
  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 K48955220: Installing an OPSWAT Endpoint Security update on BIG-IP APM
    systems (11.4.x and later)
  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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