Executive Summary

Informations
Name CVE-2020-27749 First vendor Publication 2021-03-03
Vendor Cve Last vendor Modification 2021-05-01

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 6.7
Base Score 6.7 Environmental Score 6.7
impact SubScore 5.9 Temporal Score 6.7
Exploitabality Sub Score 0.8
 
Attack Vector Local Attack Complexity Low
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:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27749

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-121 Stack-based Buffer Overflow

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 7
Os 1
Os 2
Os 6
Os 3
Os 4
Os 1

Sources (Detail)

Source Url
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
GENTOO https://security.gentoo.org/glsa/202104-05
MISC https://bugzilla.redhat.com/show_bug.cgi?id=1899966

Alert History

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Date Informations
2021-05-05 01:40:06
  • Multiple Updates
2021-05-04 13:23:58
  • Multiple Updates
2021-05-01 09:22:51
  • Multiple Updates
2021-04-24 05:22:52
  • Multiple Updates
2021-04-22 03:04:01
  • Multiple Updates
2021-03-26 12:34:20
  • First insertion