Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2020.1764.2
Rowhammer hardware vulnerability CVE-2020-10255
22 January 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: BIG-IP iSeries
VIPRION B4450 blades
Publisher: F5 Networks
Operating System: Network Appliance
Impact/Access: Increased Privileges -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-10255
Original Bulletin:
https://support.f5.com/csp/article/K60570139
Revision History: January 22 2021: Vendor updated vulnerable product information
May 19 2020: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
K60570139: Rowhammer hardware vulnerability CVE-2020-10255
Original Publication Date: 19 May, 2020
Latest Publication Date: 22 Jan, 2021
Security Advisory Description
Modern DRAM chips (DDR4 and LPDDR4 after 2015) are affected by a vulnerability
in deployment of internal mitigations against RowHammer attacks known as Target
Row Refresh (TRR), aka the TRRespass issue. To exploit this vulnerability, the
attacker needs to create certain access patterns to trigger bit flips on
affected memory modules, aka a Many-sided RowHammer attack. This means that,
even when chips advertised as RowHammer-free are used, attackers may still be
able to conduct privilege-escalation attacks against the kernel, conduct
privilege-escalation attacks against the Sudo binary, and achieve cross-tenant
virtual-machine access by corrupting RSA keys. The issue affects chips produced
by SK Hynix, Micron, and Samsung. NOTE: tracking DRAM supply-chain issues is
not straightforward because a single product model from a single vendor may use
DRAM chips from different manufacturers. (CVE-2020-10255)
Impact
This vulnerability impacts BIG-IP iSeries platforms and VIPRION B4450 blades
only.
An unprivileged system user may leverage this flaw and use rowhammer attack
variants to induce bit corruptions across memory space, potentially resulting
in a denial of service or privileges escalation scenarios. The highest threat
from this vulnerability is to system availability.
Security Advisory Status
F5 Product Development has assigned ID 909345 (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| | | | |
+-------------------+------+----------+----------+----------+------+----------+
| |15.x |15.0.0 - |None | | | |
| | |15.1.0 | | | | |
| +------+----------+----------+ | | |
| |14.x |14.1.0 - |None | | | |
|BIG-IP (LTM, AAM, | |14.1.2 | | | | |
|AFM, Analytics, +------+----------+----------+ | | |
|APM, ASM, DNS, FPS,|13.x |13.1.0 - |None |Medium |6.5 |Hardware: |
|GTM, Link | |13.1.3 | | | |DRAM chips|
|Controller, PEM) +------+----------+----------+ | | |
| |12.x |12.1.0 - |None | | | |
| | |12.1.5 | | | | |
| +------+----------+----------+ | | |
| |11.x |11.6.1 - |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.
F5 will not develop a fix for vulnerable products that do not already have a
fixed version listed in this article, and will not update this table with
subsequent vulnerable releases in the associated branches. F5 recommends that
you update to more recent, non-vulnerable versions whenever feasible. For more
information, refer to K4602: Overview of the F5 security vulnerability response
policy.
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 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 K9502: BIG-IP hotfix and point release matrix
o K13123: Managing BIG-IP product hotfixes (11.x - 15.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
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967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=wTLI
-----END PGP SIGNATURE-----