grub2 up to 2.05 Command Line stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in grub2 up to 2.05. The impacted element is an unknown function of the component Command Line Handler. This manipulation causes stack-based overflow. This vulnerability is tracked as CVE-2020-27749. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in grub2 up to 2.05 and classified as critical. Affected by this vulnerability is some unknown processing of the component Command Line Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was disclosed 03/04/2021. The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2020-27749. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 208609 (CentOS 7 : grub2 (RHSA-2021:0699)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.06 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (208609). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 208609
Nessus Name: CentOS 7 : grub2 (RHSA-2021:0699)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: grub2 2.06

Timelineinfo

10/27/2020 🔍
03/04/2021 +128 days 🔍
03/04/2021 +0 days 🔍
10/13/2024 +1319 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Confirmed

CVE: CVE-2020-27749 (🔍)
GCVE (CVE): GCVE-0-2020-27749
GCVE (VulDB): GCVE-100-170617

Entryinfo

Created: 03/04/2021 07:34
Updated: 10/13/2024 13:29
Changes: 03/04/2021 07:34 (37), 03/06/2021 14:29 (5), 03/14/2021 13:51 (18), 10/13/2024 13:29 (17)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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