Bug 1789927 (CVE-2019-5108) - CVE-2019-5108 kernel: triggering AP to send IAPP location updates for stations before the required authentication process has completed can lead to DoS
Summary: CVE-2019-5108 kernel: triggering AP to send IAPP location updates for station...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-5108
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: 1789928 1802416 1802417 1802418 1802419 1802421
Blocks: 1789929
TreeView+ depends on / blocked
 
Reported: 2020-01-10 18:05 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-02-16 20:47 UTC (History)
45 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel’s implementation of the WiFi station handoff code. An attacker within the radio range could use this flaw to deny a valid device from joining the access point.
Clone Of:
Environment:
Last Closed: 2020-04-16 16:32:01 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2020:1493 0 None None None 2020-04-16 14:38:48 UTC

Description Guilherme de Almeida Suckevicz 2020-01-10 18:05:32 UTC 
An exploitable denial-of-service vulnerability exists in the Linux kernel. An attacker could exploit this vulnerability by triggering AP to send IAPP location updates for stations before the required authentication process has completed. This could lead to different denial-of-service scenarios, either by causing CAM table attacks, or by leading to traffic flapping if faking already existing clients in other nearby APs of the same wireless infrastructure. An attacker within radio range can forge Authentication and Association Request packets to trigger this vulnerability.

Reference:
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0900
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e493173b7841259a08c5c8e5cbe90adb349da7e
Comment 1 Guilherme de Almeida Suckevicz 2020-01-10 18:07:16 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1789928]
Comment 5 Wade Mealing 2020-02-13 05:54:16 UTC 
Mitigation:

At this time there is no known mitigations to this issue other than to install the updated kernel package.
Comment 8 Justin M. Forbes 2020-03-20 15:24:10 UTC 
This was fixed for Fedora with the 5.3 kernel rebases.
Comment 9 errata-xmlrpc 2020-04-16 14:38:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1493 https://access.redhat.com/errata/RHSA-2020:1493
Comment 10 Product Security DevOps Team 2020-04-16 16:32:01 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-2019-5108
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