Bug 1951739 (CVE-2021-42739) - CVE-2021-42739 kernel: Heap buffer overflow in firedtv driver
Summary: CVE-2021-42739 kernel: Heap buffer overflow in firedtv driver
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-42739
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: 1956470 1956471 1956472 1956473 1956474 1958655 1965287
Blocks: 1951740 1958946
TreeView+ depends on / blocked
 
Reported: 2021-04-20 20:07 UTC by Pedro Sampaio
Modified: 2022-06-16 11:22 UTC (History)
45 users (show)

Fixed In Version: kernel 3.10.0
Doc Type: If docs needed, set a value
Doc Text:
A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-11-10 15:56:18 UTC

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2022:2229 0 None None None 2022-05-12 11:26:16 UTC
Red Hat Product Errata RHBA-2022:4630 0 None None None 2022-05-18 11:46:00 UTC
Red Hat Product Errata RHBA-2022:4693 0 None None None 2022-05-19 05:10:27 UTC
Red Hat Product Errata RHBA-2022:4969 0 None None None 2022-06-08 18:39:30 UTC
Red Hat Product Errata RHBA-2022:5088 0 None None None 2022-06-16 11:22:48 UTC
Red Hat Product Errata RHSA-2022:0063 0 None None None 2022-01-11 17:29:58 UTC
Red Hat Product Errata RHSA-2022:0065 0 None None None 2022-01-11 17:31:25 UTC
Red Hat Product Errata RHSA-2022:1975 0 None None None 2022-05-10 14:38:59 UTC
Red Hat Product Errata RHSA-2022:1988 0 None None None 2022-05-10 14:44:41 UTC

Description Pedro Sampaio 2021-04-20 20:07:00 UTC 
A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

References:

https://seclists.org/oss-sec/2021/q2/46
Comment 1 Alex 2021-05-03 18:30:15 UTC 
External References:

https://lore.kernel.org/linux-media/YHaulytonFcW+lyZ@mwanda/
Comment 3 Alex 2021-05-09 15:00:31 UTC 
Mitigation:

To mitigate this issue, prevent the module firedtv from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
Comment 7 Rohit Keshri 2021-05-27 11:26:36 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1965287]
Comment 14 errata-xmlrpc 2022-01-11 17:29:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0063 https://access.redhat.com/errata/RHSA-2022:0063
Comment 15 errata-xmlrpc 2022-01-11 17:31:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0065 https://access.redhat.com/errata/RHSA-2022:0065
Comment 16 errata-xmlrpc 2022-05-10 14:38:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975
Comment 17 errata-xmlrpc 2022-05-10 14:44:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988
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