Bug 2112975 (CVE-2022-2601)

Summary:	CVE-2022-2601 grub2: Buffer overflow in grub_font_construct_glyph() can lead to out-of-bound write and possible secure boot bypass
Product:	[Other] Security Response	Reporter:	Marco Benatto <mbenatto>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bootloader-eng-team, jaredz, j.becker, mlewando, pjanda, pjones, pkotvan, rharwood, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	grub 2.06	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found where a maliciously crafted pf2 font could lead to an out-of-bounds write in grub2. A successful attack can lead to memory corruption and secure boot circumvention.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-02-16 00:28:32 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2116931, 2116932, 2116933, 2116934, 2116935, 2116936, 2116937, 2141374, 2141376, 2142996
Bug Blocks:	2112969

Description Marco Benatto 2022-08-01 15:21:57 UTC

A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.

Comment 5 Marco Benatto 2022-11-15 18:09:04 UTC

Created grub2 tracking bugs for this issue:

Affects: fedora-all [bug 2142996]

Comment 6 errata-xmlrpc 2022-11-16 10:48:13 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

Via RHSA-2022:8494 https://access.redhat.com/errata/RHSA-2022:8494

Comment 7 errata-xmlrpc 2022-12-06 08:54:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support
  Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.2 Telecommunications Update Service

Via RHSA-2022:8800 https://access.redhat.com/errata/RHSA-2022:8800

Comment 8 errata-xmlrpc 2022-12-13 16:06:51 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2022:8978 https://access.redhat.com/errata/RHSA-2022:8978

Comment 9 errata-xmlrpc 2023-01-09 14:43:02 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:0049 https://access.redhat.com/errata/RHSA-2023:0049

Comment 10 errata-xmlrpc 2023-01-09 14:44:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2023:0048 https://access.redhat.com/errata/RHSA-2023:0048

Comment 11 errata-xmlrpc 2023-01-09 14:44:45 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2023:0047 https://access.redhat.com/errata/RHSA-2023:0047

Comment 12 errata-xmlrpc 2023-02-14 09:07:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:0752 https://access.redhat.com/errata/RHSA-2023:0752

Comment 13 Product Security DevOps Team 2023-02-16 00:28:30 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-2022-2601

Comment 15 errata-xmlrpc 2024-04-23 16:26:05 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2024:2002 https://access.redhat.com/errata/RHSA-2024:2002