Bug 2151761 (CVE-2022-4283) - CVE-2022-4283 xorg-x11-server: XkbGetKbdByName use-after-free
Summary: CVE-2022-4283 xorg-x11-server: XkbGetKbdByName use-after-free
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-4283
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2151799 2151800 2151801 2151802 2151803 2153127 2153128 2153129 2153130 2154205 2154206 2154233 2154234 2154267
Blocks: 2151201
TreeView+ depends on / blocked
 
Reported: 2022-12-08 05:12 UTC by Sandipan Roy
Modified: 2023-05-16 08:17 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in X.Org. This issue occurs because the XkbCopyNames function leaves a dangling pointer to freed memory, resulting in out-of-bounds memory access on subsequent XkbGetKbdByName requests. This flaw can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.
Clone Of:
Environment:
Last Closed: 2023-01-11 12:00:40 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:0045 0 None None None 2023-01-09 14:53:16 UTC
Red Hat Product Errata RHSA-2023:0046 0 None None None 2023-01-09 14:53:40 UTC
Red Hat Product Errata RHSA-2023:2248 0 None None None 2023-05-09 07:22:09 UTC
Red Hat Product Errata RHSA-2023:2249 0 None None None 2023-05-09 07:22:27 UTC
Red Hat Product Errata RHSA-2023:2257 0 None None None 2023-05-09 07:23:22 UTC
Red Hat Product Errata RHSA-2023:2805 0 None None None 2023-05-16 08:15:10 UTC
Red Hat Product Errata RHSA-2023:2806 0 None None None 2023-05-16 08:15:23 UTC
Red Hat Product Errata RHSA-2023:2830 0 None None None 2023-05-16 08:17:48 UTC

Description Sandipan Roy 2022-12-08 05:12:22 UTC 
CVE-2022-4283/ZDI-CAN-19530: X.Org Server XkbGetKbdByName use-after-free

The XkbCopyNames function left a dangling pointer to freed memory, 
resulting in out-of-bounds memory access on subsequent XkbGetKbdByName 
requests.
Comment 2 Sandipan Roy 2022-12-08 06:35:29 UTC 
Xorg server does not run with root privileges in Red Hat Enterprise Linux 8 and 9, therefore Red Hat Enterprise Linux 8 and 9 have been rated with a moderate severity.
Comment 5 Sandipan Roy 2022-12-14 04:45:23 UTC 
Created xorg-x11-server tracking bugs for this issue:

Affects: fedora-36 [bug 2153127]
Affects: fedora-37 [bug 2153128]


Created xorg-x11-server-Xwayland tracking bugs for this issue:

Affects: fedora-36 [bug 2153129]
Affects: fedora-37 [bug 2153130]
Comment 6 Sandipan Roy 2022-12-16 09:56:26 UTC 
Created tigervnc tracking bugs for this issue:

Affects: fedora-36 [bug 2154205]
Affects: fedora-37 [bug 2154206]
Comment 9 errata-xmlrpc 2023-01-09 14:53:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2023:0045 https://access.redhat.com/errata/RHSA-2023:0045
Comment 10 errata-xmlrpc 2023-01-09 14:53:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2023:0046 https://access.redhat.com/errata/RHSA-2023:0046
Comment 11 Product Security DevOps Team 2023-01-11 12:00:38 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-2022-4283
Comment 12 errata-xmlrpc 2023-05-09 07:22:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2248 https://access.redhat.com/errata/RHSA-2023:2248
Comment 13 errata-xmlrpc 2023-05-09 07:22:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2249 https://access.redhat.com/errata/RHSA-2023:2249
Comment 14 errata-xmlrpc 2023-05-09 07:23:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2257 https://access.redhat.com/errata/RHSA-2023:2257
Comment 15 errata-xmlrpc 2023-05-16 08:15:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2805 https://access.redhat.com/errata/RHSA-2023:2805
Comment 16 errata-xmlrpc 2023-05-16 08:15:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2806 https://access.redhat.com/errata/RHSA-2023:2806
Comment 17 errata-xmlrpc 2023-05-16 08:17:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2830 https://access.redhat.com/errata/RHSA-2023:2830
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