Bug 1960321 (CVE-2021-38578) - CVE-2021-38578 edk2: integer underflow in SmmEntryPoint function leads to potential SMM privilege escalation
Summary: CVE-2021-38578 edk2: integer underflow in SmmEntryPoint function leads to pot...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-38578
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: 1989856 1989857 2096378 2096379
Blocks: 1959708
TreeView+ depends on / blocked
 
Reported: 2021-05-13 16:32 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-05-09 14:45 UTC (History)
13 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2023-05-09 14:45:53 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:2165 0 None None None 2023-05-09 07:13:12 UTC

Description Guilherme de Almeida Suckevicz 2021-05-13 16:32:19 UTC 
Existing CommBuffer checks in SmmEntryPoint will not catch underflow when computing BufferSize.

Reference:
https://bugzilla.tianocore.org/show_bug.cgi?id=3387
Comment 5 Mauro Matteo Cascella 2022-06-13 16:39:29 UTC 
Created edk2 tracking bugs for this issue:

Affects: epel-7 [bug 2096378]
Affects: fedora-all [bug 2096379]
Comment 6 Gerd Hoffmann 2022-06-14 11:59:28 UTC 
https://edk2.groups.io/g/devel/message/90516
Comment 8 errata-xmlrpc 2023-05-09 07:13:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:2165 https://access.redhat.com/errata/RHSA-2023:2165
Comment 9 Product Security DevOps Team 2023-05-09 14:45:50 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-2021-38578
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