Bug 1959654 (CVE-2020-24587) - CVE-2020-24587 kernel: Reassembling fragments encrypted under different keys
Summary: CVE-2020-24587 kernel: Reassembling fragments encrypted under different keys
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-24587
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1978181 1960112 1960113 1960114 1960115
Blocks: 1959275
TreeView+ depends on / blocked
 
Reported: 2021-05-12 03:22 UTC by Wade Mealing
Modified: 2021-11-09 21:21 UTC (History)
43 users (show)

Fixed In Version: kernel 5.13 rc4
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel's WiFi implementation. An attacker within the wireless range can abuse a logic flaw in the WiFi implementation by reassembling packets from multiple fragments under different keys, treating them as valid. This flaw allows an attacker to send a fragment under an incorrect key, treating them as a valid fragment under the new key. The highest threat from this vulnerability is to confidentiality.
Clone Of:
Environment:
Last Closed: 2021-11-09 21:21:07 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:4140 0 None None None 2021-11-09 17:22:35 UTC
Red Hat Product Errata RHSA-2021:4356 0 None None None 2021-11-09 18:25:33 UTC

Description Wade Mealing 2021-05-12 03:22:57 UTC 
A flaw was found in the Linux kernel's wifi implementation wherein an attacker within wireless range is able to abuse a logic flaw in the wifi implementation by reassembling packets from multiple fragments under different keys and they would be treated as valid.  This allows an attacker to send a fragment under an incorrect key and be treated as a valid fragment under the new key.

Upstream patch:
https://lore.kernel.org/linux-wireless/20210511200110.3f8290e59823.I622a67769ed39257327a362cfc09c812320eb979@changeid/
Comment 5 Wade Mealing 2021-05-13 04:54:46 UTC 
Mitigation:

Mitigation for this issue is either not available or the currently available options does not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Comment 6 Wade Mealing 2021-05-13 04:55:51 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1960112]
Comment 21 Justin M. Forbes 2021-06-29 16:14:03 UTC 
This was fixed for Fedora with the 5.12.9 stable kernel updates.
Comment 24 errata-xmlrpc 2021-11-09 17:22:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4140 https://access.redhat.com/errata/RHSA-2021:4140
Comment 25 errata-xmlrpc 2021-11-09 18:25:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:4356 https://access.redhat.com/errata/RHSA-2021:4356
Comment 26 Product Security DevOps Team 2021-11-09 21:21:03 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-2020-24587
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