Bug 1660385 (CVE-2018-20169) - CVE-2018-20169 kernel: usb: missing size check in the __usb_get_extra_descriptor() leading to DoS
Summary: CVE-2018-20169 kernel: usb: missing size check in the __usb_get_extra_descrip...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-20169
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: 1660386 Engineering1689304 Engineering1689305 Engineering1689306 Engineering1689307 Engineering1689308 Engineering1689309 Engineering1828283 Engineering1828284 Engineering1836415 Engineering1836416 Engineering1836417 Engineering1836418
Blocks: Embargoed1660387
TreeView+ depends on / blocked
 
Reported: 2018-12-18 09:12 UTC by Andrej Nemec
Modified: 2023-05-12 21:14 UTC (History)
19 users (show)

Fixed In Version:
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Doc Text:
A flaw was discovered in the Linux kernel's USB subsystem in the __usb_get_extra_descriptor() function in the drivers/usb/core/usb.c which mishandles a size check during the reading of an extra descriptor data. By using a specially crafted USB device which sends a forged extra descriptor, an unprivileged user with physical access to the system can potentially cause a privilege escalation or trigger a system crash or lock up and thus to cause a denial of service (DoS).
Clone Of:
Environment:
Last Closed: 2019-11-06 00:51:32 UTC

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:3309 0 None None None 2019-11-05 20:35:01 UTC
Red Hat Product Errata RHSA-2019:3517 0 None None None 2019-11-05 21:05:37 UTC
Red Hat Product Errata RHSA-2020:1016 0 None None None 2020-03-31 19:11:24 UTC
Red Hat Product Errata RHSA-2020:1070 0 None None None 2020-03-31 19:20:18 UTC
Red Hat Product Errata RHSA-2020:2522 0 None None None 2020-06-11 02:10:00 UTC
Red Hat Product Errata RHSA-2020:2770 0 None None None 2020-06-30 12:10:23 UTC
Red Hat Product Errata RHSA-2020:2777 0 None None None 2020-07-01 10:07:41 UTC
Red Hat Product Errata RHSA-2020:2851 0 None None None 2020-07-07 09:51:39 UTC

Description Andrej Nemec 2018-12-18 09:12:19 UTC 
A flaw was discovered in the Linux kernel's USB subsystem in the __usb_get_extra_descriptor() function in the drivers/usb/core/usb.c which mishandles a size check during the reading of an extra descriptor data. By using a specially crafted USB device which sends a forged extra descriptor, an unprivileged user with physical access to the system can potentially cause a  privilege escalation or trigger a system crash or lock up and thus to cause a denial of service (DoS).

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=704620afc70cf47abb9d6a1a57f3825d2bca49cf
Comment 1 Andrej Nemec 2018-12-18 09:12:42 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1660386]
Comment 2 Justin M. Forbes 2018-12-18 15:41:51 UTC 
This was fixed for Fedora with the 4.19.9 stable kernel updates
Comment 6 errata-xmlrpc 2019-11-05 20:34:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3309 https://access.redhat.com/errata/RHSA-2019:3309
Comment 7 errata-xmlrpc 2019-11-05 21:05:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:3517 https://access.redhat.com/errata/RHSA-2019:3517
Comment 8 Product Security DevOps Team 2019-11-06 00:51:32 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-2018-20169
Comment 9 errata-xmlrpc 2020-03-31 19:11:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1016 https://access.redhat.com/errata/RHSA-2020:1016
Comment 10 errata-xmlrpc 2020-03-31 19:20:16 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:1070 https://access.redhat.com/errata/RHSA-2020:1070
Comment 15 errata-xmlrpc 2020-06-11 02:09:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Extended Update Support

Via RHSA-2020:2522 https://access.redhat.com/errata/RHSA-2020:2522
Comment 17 errata-xmlrpc 2020-06-30 12:10:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support

Via RHSA-2020:2770 https://access.redhat.com/errata/RHSA-2020:2770
Comment 18 errata-xmlrpc 2020-07-01 10:07:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2020:2777 https://access.redhat.com/errata/RHSA-2020:2777
Comment 19 errata-xmlrpc 2020-07-07 09:51:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2020:2851 https://access.redhat.com/errata/RHSA-2020:2851
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