Bug 1852030 (CVE-2020-14310)

Summary: CVE-2020-14310 grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow
Product: [Other] Security Response Reporter: Marco Benatto <mbenatto>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: bootloader-eng-team, fmartine, lkundrak, pjones, 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 in grub2. An expected font value is not verified before proceeding with buffer allocations allowing an attacker to use a malicious font file to create an arithmetic overflow, zero-sized allocation, and further heap-based buffer overflow. The highest threat from this vulnerability is to data integrity and system availability.
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-07-29 19:27:54 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: 1854568, 1854569, 1854570, 1854571, 1854572, 1854573, 1854574, 1854575, 1854576, 1854577, 1854578, 1863020    
Bug Blocks: 1852004    

Description Marco Benatto 2020-06-29 15:36:32 UTC
Integer overflow in read_section_as_string triggered by a specially crafted font file containing a NAME section with a length of UINT32_MAX, which leads to a zero-sized allocation and subsequent heap buffer overflow with attacker controlled data.

Comment 2 Marco Benatto 2020-07-07 17:32:20 UTC
Acknowledgments:

Name: Chris Coulson (Ubuntu Security Team)

Comment 6 errata-xmlrpc 2020-07-29 18:30:48 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:3216 https://access.redhat.com/errata/RHSA-2020:3216

Comment 7 Product Security DevOps Team 2020-07-29 19:27:54 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-2020-14310

Comment 8 errata-xmlrpc 2020-07-29 19:34:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2020:3217 https://access.redhat.com/errata/RHSA-2020:3217

Comment 9 errata-xmlrpc 2020-07-29 19:38:09 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2020:3223 https://access.redhat.com/errata/RHSA-2020:3223

Comment 10 errata-xmlrpc 2020-07-29 20:14:50 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

Via RHSA-2020:3227 https://access.redhat.com/errata/RHSA-2020:3227

Comment 11 errata-xmlrpc 2020-08-03 10:57:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.2 Advanced Update Support

Via RHSA-2020:3273 https://access.redhat.com/errata/RHSA-2020:3273

Comment 12 errata-xmlrpc 2020-08-03 11:14:10 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support
  Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.4 Telco Extended Update Support

Via RHSA-2020:3275 https://access.redhat.com/errata/RHSA-2020:3275

Comment 13 errata-xmlrpc 2020-08-03 11:52:45 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Extended Update Support

Via RHSA-2020:3271 https://access.redhat.com/errata/RHSA-2020:3271

Comment 14 errata-xmlrpc 2020-08-03 12:02:38 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Advanced Update Support
  Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.3 Telco Extended Update Support

Via RHSA-2020:3276 https://access.redhat.com/errata/RHSA-2020:3276

Comment 15 errata-xmlrpc 2020-08-03 12:06:03 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Extended Update Support

Via RHSA-2020:3274 https://access.redhat.com/errata/RHSA-2020:3274

Comment 16 Marco Benatto 2020-08-03 13:45:47 UTC
Created grub2 tracking bugs for this issue:

Affects: fedora-all [bug 1863020]