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AUSCERT External Security Bulletin Redistribution
ESB-2020.3186.3
BIND vulnerability CVE-2020-8623
19 October 2020
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP BIND
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-8623
Reference: ESB-2020.2977
ESB-2020.2954
ESB-2020.2881
ESB-2020.2872
Original Bulletin:
https://support.f5.com/csp/article/K82252291
Revision History: October 19 2020: Fixed version added to advisory
September 25 2020: Minor advisory update
September 17 2020: Initial Release
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K82252291:BIND vulnerability CVE-2020-8623
Security Advisory
Original Publication Date: 25 Aug, 2020
Latest Publication Date: 16 Oct, 2020
Security Advisory Description
If BIND is built with "--enable-native-pkcs11" then a specially crafted query
for a zone signed with RSA can trigger an assertion failure. (CVE-2020-8623)
Impact
A zone signed with RSA is vulnerable to this issue. When an attacker sends a
specially crafted query to the vulnerable zone, the BIND process experiences an
assertion failure and restarts.
Security Advisory Status
F5 Product Development has assigned ID 935721 (BIG-IP) 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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |16.x |16.0.0 |16.0.0.1 | | | |
| +------+----------+----------+ | | |
| |15.x |15.0.0 - |15.1.1 | | | |
| | |15.1.0 | | | | |
|BIG-IP (LTM, AAM, +------+----------+----------+ | | |
|Advanced WAF, AFM, |14.x |14.1.0 - |14.1.2.8 | | | |
|Analytics, APM, | |14.1.2 | | | | |
|ASM, DDHD, DNS, +------+----------+----------+High |7.5 |BIND |
|FPS, GTM, Link |13.x |13.1.2 - |None | | | |
|Controller, PEM, | |13.1.3 | | | | |
|SSLO) +------+----------+----------+ | | |
| |12.x |12.1.4 - |None | | | |
| | |12.1.5 | | | | |
| +------+----------+----------+ | | |
| |11.x |11.6.4 - |None | | | |
| | |11.6.5 | | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |7.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
|BIG-IQ Centralized |6.x |None |Not |Not |None |None |
|Management | | |applicable|vulnerable| | |
| +------+----------+----------+ | | |
| |5.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
|Traffix SDC |5.x |None |Not |Not |None |None |
| | | |applicable|vulnerable| | |
+-------------------+------+----------+----------+----------+------+----------+
^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.
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.
Mitigation
None
Supplemental Information
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 - 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
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