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AUSCERT External Security Bulletin Redistribution
ESB-2022.5866
K73422160: OpenSSL vulnerability CVE-2019-1547
14 November 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: F5OS-A
F5OS-C
Traffix SDC
Publisher: F5 Networks
Operating System: Network Appliance
Resolution: Patch/Upgrade
CVE Names: CVE-2019-1547
Original Bulletin:
https://support.f5.com/csp/article/K73422160
Comment: CVSS (Max): 5.5 CVE-2019-1547 (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
CVSS Source: F5 Networks
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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K73422160: OpenSSL vulnerability CVE-2019-1547
Original Publication Date: 10 Oct, 2019
Latest Publication Date: 14 Nov, 2022
Security Advisory Description
Normally in OpenSSL EC groups always have a co-factor present and this is used
in side channel resistant code paths. However, in some cases, it is possible to
construct a group using explicit parameters (instead of using a named curve).
In those cases it is possible that such a group does not have the cofactor
present. This can occur even where all the parameters match a known named
curve. If such a curve is used then OpenSSL falls back to non-side channel
resistant code paths which may result in full key recovery during an ECDSA
signature operation. In order to be vulnerable an attacker would have to have
the ability to time the creation of a large number of signatures where explicit
parameters with no co-factor present are in use by an application using
libcrypto. For the avoidance of doubt libssl is not vulnerable because explicit
parameters are never used. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).
Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t
(Affected 1.0.2-1.0.2s). (CVE-2019-1547)
Impact
A local attacker can recover a full key during an ECDSA signature operation.
Security Advisory Status
F5 Product Development has assigned ID 1188761 (F5OS) and CPF-25136
and CPF-25137 (Traffix) 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, point 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 | |CVSSv3|Vulnerable|
|Product |Branch|known to |introduced|Severity |score^|component |
| | |be |in | |1 |or feature|
| | |vulnerable| | | | |
+------------------+------+----------+----------+-----------+------+----------+
| |15.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
|BIG-IP (LTM, AAM, |14.x |None |Not | | | |
|AFM, Analytics, | | |applicable| | | |
|APM, ASM, DNS, +------+----------+----------+ | | |
|Edge Gateway, FPS,|13.x |None |Not |Not |None |None |
|GTM, Link | | |applicable|vulnerable | | |
|Controller, PEM, +------+----------+----------+ | | |
|WebAccelerator) |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+------------------+------+----------+----------+-----------+------+----------+
|BIG-IP (APM | | |Not |Not | | |
|Clients) |7.1.x |None |applicable|vulnerable^|None |None |
| | | | |2 | | |
+------------------+------+----------+----------+-----------+------+----------+
|Enterprise Manager|3.x |None |Not |Not |None |None |
| | | |applicable|vulnerable | | |
+------------------+------+----------+----------+-----------+------+----------+
| |7.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
|BIG-IQ Centralized|6.x |None |Not |Not |None |None |
|Management | | |applicable|vulnerable | | |
| +------+----------+----------+ | | |
| |5.x |None |Not | | | |
| | | |applicable| | | |
+------------------+------+----------+----------+-----------+------+----------+
|F5OS-A |1.x |1.0.0 - |1.3.0 |Medium |5.5 |OpenSSL |
| | |1.2.0 | | | | |
+------------------+------+----------+----------+-----------+------+----------+
|F5OS-C |1.x |1.3.0 - |None |Medium |5.5 |OpenSSL |
| | |1.5.0 | | | | |
+------------------+------+----------+----------+-----------+------+----------+
|F5 iWorkflow |2.x |None |Not |Not |None |None |
| | | |applicable|vulnerable | | |
+------------------+------+----------+----------+-----------+------+----------+
|Traffix SDC |5.x |5.0.0 - |None |Medium |5.5 |OpenSSL |
| | |5.1.0 | | | | |
+------------------+------+----------+----------+-----------+------+----------+
^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.
^2The specified products contain the affected code. However, F5 identifies the
vulnerability status as Not vulnerable because the attacker cannot exploit the
code in default, standard, or recommended configurations.
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
None
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 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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