Bug 2020362 (CVE-2021-43267) - CVE-2021-43267 kernel: Insufficient validation of user-supplied sizes for the MSG_CRYPTO message type
Summary: CVE-2021-43267 kernel: Insufficient validation of user-supplied sizes for the...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-43267
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact: Li Shuang
URL:
Whiteboard:
Depends On: 2020493 2020503 2020504 2020505 2020506 2020507 2020508 2020509 2020510 2020511 2020512 2020513 2020561 2020562 2021785
Blocks: 2020364
TreeView+ depends on / blocked
 
Reported: 2021-11-04 16:37 UTC by Pedro Sampaio
Modified: 2025-04-04 13:25 UTC (History)
62 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2021-11-19 19:50:44 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4644 0 None None None 2021-11-15 10:52:50 UTC
Red Hat Product Errata RHSA-2021:4645 0 None None None 2021-11-15 10:44:48 UTC
Red Hat Product Errata RHSA-2021:4646 0 None None None 2021-11-15 10:10:28 UTC
Red Hat Product Errata RHSA-2021:4647 0 None None None 2021-11-15 11:21:04 UTC
Red Hat Product Errata RHSA-2021:4648 0 None None None 2021-11-15 10:13:21 UTC
Red Hat Product Errata RHSA-2021:4650 0 None None None 2021-11-15 11:06:17 UTC
Red Hat Product Errata RHSA-2021:4750 0 None None None 2021-11-19 19:21:53 UTC

Description Pedro Sampaio 2021-11-04 16:37:27 UTC 
A flaw was found in the Transparent Inter-Process Communication (TIPC) functionality in the Linux kernel. This flaw can allow an attacker able to send MSG_CRYPTO messages to one of the interconnected nodes to exploit insufficient validation of user-supplied key sizes resulting in memory corruption and potentially privilege escalation.

References:

https://github.com/torvalds/linux/commit/fa40d9734a57bcbfa79a280189799f76c88f7bb0
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.16
https://thehackernews.com/2021/11/critical-rce-vulnerability-reported-in.html
Comment 4 Wade Mealing 2021-11-05 05:41:05 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2020493]
Comment 8 juneau 2021-11-05 13:14:13 UTC 
Per SRE, OSD is notaffected. "it isn't loaded by default and you'd need to run a priv'd container to get CAP_SYS_MODULE to be able to load it."
Comment 12 errata-xmlrpc 2021-11-15 10:10:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4646 https://access.redhat.com/errata/RHSA-2021:4646
Comment 13 errata-xmlrpc 2021-11-15 10:13:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2021:4648 https://access.redhat.com/errata/RHSA-2021:4648
Comment 14 errata-xmlrpc 2021-11-15 10:44:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4645 https://access.redhat.com/errata/RHSA-2021:4645
Comment 15 errata-xmlrpc 2021-11-15 10:52:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2021:4644 https://access.redhat.com/errata/RHSA-2021:4644
Comment 16 errata-xmlrpc 2021-11-15 11:06:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2021:4650 https://access.redhat.com/errata/RHSA-2021:4650
Comment 17 errata-xmlrpc 2021-11-15 11:21:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4647 https://access.redhat.com/errata/RHSA-2021:4647
Comment 18 errata-xmlrpc 2021-11-19 19:21:49 UTC 
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 8

Via RHSA-2021:4750 https://access.redhat.com/errata/RHSA-2021:4750
Comment 19 Product Security DevOps Team 2021-11-19 19:50:39 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-43267
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