Bug 2134377 (CVE-2022-41674) - CVE-2022-41674 kernel: u8 overflow problem in cfg80211_update_notlisted_nontrans()
Summary: CVE-2022-41674 kernel: u8 overflow problem in cfg80211_update_notlisted_nontr...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-41674
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: 2134383 2134384 2134385 2134386 2134465
Blocks: 2133534
TreeView+ depends on / blocked
 
Reported: 2022-10-13 09:58 UTC by Rohit Keshri
Modified: 2023-05-16 19:44 UTC (History)
52 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A buffer overflow flaw was found in the u8 overflow in cfg80211_update_notlisted_nontrans() in net/wireless/scan.c in the Linux kernel’s wifi subcomponent. This flaw allows an attacker to crash the system or leak internal kernel information.
Clone Of:
Environment:
Last Closed: 2023-05-16 19:44:18 UTC
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:2148 0 None None None 2023-05-09 07:11:56 UTC
Red Hat Product Errata RHSA-2023:2458 0 None None None 2023-05-09 07:51:36 UTC
Red Hat Product Errata RHSA-2023:2736 0 None None None 2023-05-16 08:05:18 UTC
Red Hat Product Errata RHSA-2023:2951 0 None None None 2023-05-16 08:34:06 UTC

Description Rohit Keshri 2022-10-13 09:58:06 UTC 
In the copy code of the elements, we do the following calculation
to reach the end of the MBSSID element:

	/* copy the IEs after MBSSID */
	cpy_len = mbssid[1] + 2;

This looks fine, however, cpy_len is a u8, the same as mbssid[1],
so the addition of two can overflow. In this case the subsequent
memcpy() will overflow the allocated buffer, since it copies 256
bytes too much due to the way the allocation and memcpy() sizes
are calculated.
Comment 6 Marian Rehak 2022-10-13 13:17:35 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2134465]
Comment 11 errata-xmlrpc 2023-05-09 07:11:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2148 https://access.redhat.com/errata/RHSA-2023:2148
Comment 12 errata-xmlrpc 2023-05-09 07:51:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2458 https://access.redhat.com/errata/RHSA-2023:2458
Comment 13 errata-xmlrpc 2023-05-16 08:05:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2736 https://access.redhat.com/errata/RHSA-2023:2736
Comment 14 errata-xmlrpc 2023-05-16 08:34:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2951 https://access.redhat.com/errata/RHSA-2023:2951
Comment 15 Product Security DevOps Team 2023-05-16 19:44:13 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-2022-41674
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