Executive Summary

Informations
Name CVE-2020-15707 First vendor Publication 2020-07-29
Vendor Cve Last vendor Modification 2020-08-08

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 6.4
Base Score 6.4 Environmental Score 6.4
impact SubScore 5.9 Temporal Score 6.4
Exploitabality Sub Score 0.5
 
Attack Vector Local Attack Complexity High
Privileges Required High User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:P/I:P/A:P)
Cvss Base Score 4.4 Attack Range Local
Cvss Impact Score 6.4 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15707

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-362 Race Condition

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 7
Application 1
Application 1
Os 4
Os 1
Os 8
Os 1
Os 1
Os 2
Os 4
Os 1
Os 2
Os 3

Sources (Detail)

Source Url
CONFIRM https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
https://security.netapp.com/advisory/ntap-20200731-0008/
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
https://www.openwall.com/lists/oss-security/2020/07/29/3
DEBIAN https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
https://www.debian.org/security/2020/dsa-4735
MLIST http://www.openwall.com/lists/oss-security/2020/07/29/3
REDHAT https://access.redhat.com/security/vulnerabilities/grub2bootloader
SUSE http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
https://www.suse.com/support/kb/doc/?id=000019673
UBUNTU http://ubuntu.com/security/notices/USN-4432-1
https://usn.ubuntu.com/4432-1/
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass

Alert History

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Date Informations
2020-09-03 01:29:45
  • Multiple Updates
2020-08-09 00:22:58
  • Multiple Updates
2020-08-05 05:22:54
  • Multiple Updates
2020-08-04 05:22:56
  • Multiple Updates
2020-07-31 21:23:10
  • Multiple Updates
2020-07-30 05:22:50
  • Multiple Updates
2020-07-30 00:22:55
  • First insertion