Bug 1991687 (CVE-2021-3697) - CVE-2021-3697 grub2: Crafted JPEG image can lead to buffer underflow write in the heap
Summary: CVE-2021-3697 grub2: Crafted JPEG image can lead to buffer underflow write in...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-3697
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: 2057546 2057547 2057548 2057549 2057550 2057551 2057552 2057553 2057554 2057555 2089822 2130193
Blocks: 1991681 1991927
TreeView+ depends on / blocked
 
Reported: 2021-08-09 17:24 UTC by Marco Benatto
Modified: 2022-09-27 13:17 UTC (History)
8 users (show)

Fixed In Version: grub 2.12
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in grub2 when handling JPEG images. This flaw allows an attacker to craft a malicious JPEG image, which leads to an underflow on a grub2's internal pointer, leading to a heap-based out-of-bounds write. Secure-boot mechanisms circumvention and arbitrary code execution may also be achievable.
Clone Of:
Environment:
Last Closed: 2022-06-16 21:08:01 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2022:5105 0 None None None 2022-06-16 21:08:36 UTC
Red Hat Product Errata RHBA-2022:5121 0 None None None 2022-06-20 01:27:26 UTC
Red Hat Product Errata RHBA-2022:5127 0 None None None 2022-06-20 12:12:08 UTC
Red Hat Product Errata RHBA-2022:5128 0 None None None 2022-06-20 14:27:03 UTC
Red Hat Product Errata RHBA-2022:5170 0 None None None 2022-06-22 11:38:33 UTC
Red Hat Product Errata RHBA-2022:5437 0 None None None 2022-06-30 07:15:16 UTC
Red Hat Product Errata RHBA-2022:5578 0 None None None 2022-07-13 15:10:20 UTC
Red Hat Product Errata RHBA-2022:5643 0 None None None 2022-07-19 15:32:28 UTC
Red Hat Product Errata RHSA-2022:5095 0 None None None 2022-06-16 15:33:57 UTC
Red Hat Product Errata RHSA-2022:5096 0 None None None 2022-06-16 14:55:16 UTC
Red Hat Product Errata RHSA-2022:5098 0 None None None 2022-06-16 13:51:16 UTC
Red Hat Product Errata RHSA-2022:5099 0 None None None 2022-06-16 15:23:47 UTC
Red Hat Product Errata RHSA-2022:5100 0 None None None 2022-06-16 15:46:02 UTC

Description Marco Benatto 2021-08-09 17:24:46 UTC 
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention.
Comment 4 errata-xmlrpc 2022-06-16 13:51:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

Via RHSA-2022:5098 https://access.redhat.com/errata/RHSA-2022:5098
Comment 5 errata-xmlrpc 2022-06-16 14:55:14 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:5096 https://access.redhat.com/errata/RHSA-2022:5096
Comment 6 errata-xmlrpc 2022-06-16 15:23:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2022:5099 https://access.redhat.com/errata/RHSA-2022:5099
Comment 7 errata-xmlrpc 2022-06-16 15:33:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:5095 https://access.redhat.com/errata/RHSA-2022:5095
Comment 8 errata-xmlrpc 2022-06-16 15:45:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2022:5100 https://access.redhat.com/errata/RHSA-2022:5100
Comment 9 Product Security DevOps Team 2022-06-16 21:07:59 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-2021-3697
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