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AUSCERT External Security Bulletin Redistribution
ESB-2021.0017
Apache Tomcat vulnerability CVE-2020-17527
4 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Traffix SDC
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2020-17527
Reference: ESB-2020.4472
ESB-2020.4294
Original Bulletin:
https://support.f5.com/csp/article/K44415301
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K44415301: Apache Tomcat vulnerability CVE-2020-17527
Original Publication Date: 01 Jan, 2021
Security Advisory Description
While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to
10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request
header value from the previous stream received on an HTTP/2 connection for the
request associated with the subsequent stream. While this would most likely
lead to an error and the closure of the HTTP/2 connection, it is possible that
information could leak between requests. (CVE-2020-17527)
Impact
A remote attacker can exploit this vulnerability to obtain sensitive data from
information leakage between HTTP requests.
Security Advisory Status
F5 Product Development has assigned ID SDC-660 (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, 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 |None |Not | | | |
| | | |applicable| | | |
| +------+----------+----------+ | | |
| |15.x |None |Not | | | |
| | | |applicable| | | |
|BIG-IP (LTM, 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 |None |Not | | | |
|BIG-IQ Centralized | | |applicable|Not | | |
|Management +------+----------+----------+vulnerable|None |None |
| |6.x |None |Not | | | |
| | | |applicable| | | |
+-------------------+------+----------+----------+----------+------+----------+
|Traffix SDC |5.x |5.1.0 |None |High |7.5 |Apache |
| | | | | | |Tomcat |
+-------------------+------+----------+----------+----------+------+----------+
^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 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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