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: 1956472 1956474 1956470 1956471 1956473 1958655 1965287
Blocks: 1958946 1951740
TreeView+ depends on / blocked
 
Reported: 2021-04-20 20:07 UTC by Pedro Sampaio
Modified: 2022-01-11 17:31 UTC (History)
45 users (show)

Fixed In Version:
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 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

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


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