CVE-2020-25647

7.6HIGH

Key Information:

Vendor
Gnu
Status
Grub2
Vendor
CVE Published:
3 March 2021

Summary

A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Affected Version(s)

grub2 grub 2.06

References

https://bugzilla.redhat.com/show_bug.cgi?id=1886936
x_refsource_MISC
https://lists.fedoraproject.org/archives/list/package-ann...
vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/202104-05
vendor-advisoryx_refsource_GENTOO

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Physical
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.