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AUSCERT External Security Bulletin Redistribution
ESB-2020.2378.2
Netty vulnerability CVE-2019-20444
16 July 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Netty
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-20444
Reference: ESB-2020.0583
ESB-2020.0582
Original Bulletin:
https://support.f5.com/csp/article/K14752415
Revision History: July 16 2020: Revised Severity and CVSS for Netty
July 14 2020: Initial Release
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K14752415:Netty vulnerability CVE-2019-20444
Security Advisory
Original Publication Date: 14 Jul, 2020
Latest Publication Date: 16 Jul, 2020
Security Advisory Description
HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header that lacks
a colon, which might be interpreted as a separate header with an incorrect
syntax, or might be interpreted as an "invalid fold."(CVE-2019-20444)
Impact
This vulnerability may result in HTTP request smuggling. When malformed or
abnormal HTTP requests are interpreted, the system may interpret them
inconsistently, allowing the attacker to 'smuggle' a request to one device
while the other device is unaware of it.
Security Advisory Status
F5 Product Development has assigned ID 924369 (BIG-IQ) 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 or |
| | |be |in | |1 |feature |
| | |vulnerable| | | | |
+----------------+------+----------+----------+----------+------+-------------+
| |16.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |15.x |None |Not | | | |
|BIG-IP (LTM, | | |applicable| | | |
|AAM, Advanced +------+----------+----------+ | | |
|WAF, AFM, |14.x |None |Not | | | |
|Analytics, APM, | | |applicable|Not | | |
|ASM, DDHD, DNS, +------+----------+----------+vulnerable|None |None |
|FPS, GTM, Link |13.x |None |Not | | | |
|Controller, PEM,| | |applicable| | | |
|SSLO) +------+----------+----------+ | | |
| |12.x |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |11.x |None |Not | | | |
| | | |applicable| | | |
+----------------+------+----------+----------+----------+------+-------------+
| |7.x |7.0.0 - |None | | | |
| | |7.1.0 | | | | |
|BIG-IQ +------+----------+----------+ | |Netty |
|Centralized |6.x |6.0.0 - |None |Medium |6.0 |(Connectivity|
|Management | |6.1.0 | | | |(SSL, |
| +------+----------+----------+ | |Sockets)) |
| |5.x |5.2.0 - |None | | | |
| | |5.4.0 | | | | |
+----------------+------+----------+----------+----------+------+-------------+
|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 K15106: Managing BIG-IQ product hotfixes
o K15113: BIG-IQ hotfix and point release matrix
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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