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AUSCERT External Security Bulletin Redistribution
ESB-2018.0570
K11274054: GNU C Library vulnerability CVE-2018-6551
27 February 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: F5 Traffix SDC
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Resolution: Mitigation
CVE Names: CVE-2018-6551
Reference: ESB-2018.0519
ESB-2018.0473
Original Bulletin:
https://support.f5.com/csp/article/K11274054
Comment: No patch currently available. F5 recommend that command line access
be restricted to mitigate.
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K11274054: GNU C Library vulnerability CVE-2018-6551
Security Advisory
Original Publication Date: Feb 27, 2018
Security Advisory Description
The malloc implementation in the GNU C Library (aka glibc or libc6), from
version 2.24 to 2.26 on powerpc, and only in version 2.26 on i386, did not
properly handle malloc calls with arguments close to SIZE_MAX and could return
a pointer to a heap region that is smaller than requested, eventually leading
to heap corruption. (CVE-2018-6551)
Impact
Traffix SDC
An attacker with administrative access to the command line may be able to
exploit the flaw to cause a denial of service (DoS).
BIG-IP, BIG-IQ, F5 iWorkflow, Enterprise Manager, ARX, and LineRate
There is no impact; these F5 products are not affected by this vulnerability.
Security Advisory Status
F5 Product Development has assigned INSTALLER-3079 (Traffix SDC) 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 |None |Not | | | |
|AFM, Analytics, | | |applicable| | | |
|APM, ASM, DNS, Edge+------+----------+----------+ | | |
|Gateway, GTM, Link |12.x |None |Not |Not |None |None |
|Controller, PEM, | | |applicable|vulnerable| | |
|WebAccelerator, +------+----------+----------+ | | |
|WebSafe) |11.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
|ARX |6.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
|Enterprise Manager |3.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
| |5.x |None |Not | | | |
|BIG-IQ Centralized | | |applicable|Not | | |
|Management +------+----------+----------+vulnerable|None |None |
| |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 |5.0.0 - |Not | | | |
| | |5.1.0 |applicable| | |glibc or |
|Traffix SDC +------+----------+----------+Low |3.5 |libc6 |
| |4.x |4.0.5 - |Not | | | |
| | |4.4.0 |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.
Note: For details about how Security Advisory articles are versioned, and what
versions are listed in the table, refer to K51812227: Understanding Security
Advisory versioning.
Mitigation
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.
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