Bug 2013180 (CVE-2021-43389) - CVE-2021-43389 kernel: an array-index-out-bounds in detach_capi_ctr in drivers/isdn/capi/kcapi.c
Summary: CVE-2021-43389 kernel: an array-index-out-bounds in detach_capi_ctr in driver...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-43389
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:
: 2016620 (view as bug list)
Depends On: 2013181 2016490 2016491 2016492
Blocks: 2013182
TreeView+ depends on / blocked
 
Reported: 2021-10-12 10:24 UTC by Marian Rehak
Modified: 2022-06-16 11:23 UTC (History)
50 users (show)

Fixed In Version: Linux kernel 5.15-rc6
Clone Of:
Environment:
Last Closed: 2022-05-11 11:15:35 UTC
Embargoed:

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 11:26:43 UTC
Red Hat Product Errata RHBA-2022:4630 0 None None None 2022-05-18 11:46:28 UTC
Red Hat Product Errata RHBA-2022:4693 0 None None None 2022-05-19 05:10:54 UTC
Red Hat Product Errata RHBA-2022:4969 0 None None None 2022-06-08 18:40:04 UTC
Red Hat Product Errata RHBA-2022:5088 0 None None None 2022-06-16 11:23:16 UTC
Red Hat Product Errata RHSA-2022:1975 0 None None None 2022-05-10 14:39:53 UTC
Red Hat Product Errata RHSA-2022:1988 0 None None None 2022-05-10 14:45:45 UTC

Description Marian Rehak 2021-10-12 10:24:16 UTC 
There is an array-index-out-bounds bug in detach_capi_ctr in drivers/isdn/capi/kcapi.c. During this process, the kernel thread would call detach_capi_ctr() to detach a register controller. if the controller was not attached yet, detach_capi_ctr() would trigger an array-index-out-bounds bug.

Reference:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1f3e2e97c003f80c4b087092b225c8787ff91e4d
https://lore.kernel.org/netdev/CAFcO6XOvGQrRTaTkaJ0p3zR7y7nrAWD79r48=L_BbOyrK9X-vA@mail.gmail.com/
Comment 1 Marian Rehak 2021-10-12 10:24:44 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2013181]
Comment 2 Justin M. Forbes 2021-10-12 17:01:59 UTC 
For Fedora:
# CONFIG_ISDN is not set
Comment 7 Wade Mealing 2021-10-26 05:29:00 UTC 
*** Bug 2016620 has been marked as a duplicate of this bug. ***
Comment 9 Salvatore Bonaccorso 2021-11-04 20:45:58 UTC 
CVE-2021-3896 seems to have been assigned by Red Hat, but was not yet published to MITRE is this right? I'm asking because there is now as well https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43389 . I contacted MITRE over the cveform to see which one should be retained, my understanding would be that both CVEs are for the same issue.
Comment 10 Salvatore Bonaccorso 2021-11-04 21:10:25 UTC 
Got a reply from MITRE already, so 

https://www.cve.org/CVERecord?id=CVE-2021-3896
https://www.cve.org/CVERecord?id=CVE-2021-43389

making CVE-2021-43389 the valid CVE and CVE-2021-3896 is REJECTED.
Comment 11 Salvatore Bonaccorso 2021-11-05 20:04:45 UTC 
As the CVE CVE-2021-3896 is rejected, can you please as well update the Bugzilla Alias for this bug?
Comment 12 Rohit Keshri 2021-11-06 17:12:52 UTC 
Hello, thank you for informing us, we have made the changes to our Bugzilla.
Comment 13 errata-xmlrpc 2022-05-10 14:39:50 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 14 errata-xmlrpc 2022-05-10 14:45:41 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
Comment 15 Product Security DevOps Team 2022-05-11 11:15:30 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-2021-43389
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