CVE-2023-4949

Status: Analyzed

Last modified: 20-11-2023

Published: 10-11-2023

6.7

SUMMARY CVE-2023-4949

An attacker with local access to a system (either through a disk or external drive) can present a modified XFS partition to grub-legacy in such a way to exploit a memory corruption in grub’s XFS file system implementation.

Access CVSS3 CVE-2023-4949

Attack Complexity	Attack Vector	Privileges Required	Scope	User Interaction
LOW	LOCAL	HIGH	UNCHANGED	NONE

Impact CVSS3 CVE-2023-4949

Confidentiality	Integrity	Availability
HIGH	HIGH	HIGH

Details CVE-2023-4949

EPSS	0.00042
EPSS %	0.05057
References	https://xenbits.xenproject.org/xsa/advisory-443.html
CWE	CWE-190
CAPEC	Forced Integer Overflow: This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
Vulnerable Configurations	cpe:2.3:a:gnu:grub:-:::::::* cpe:2.3:a:gnu:grub:-:::::::* cpe:2.3:a:gnu:grub:0.97:::::::* cpe:2.3:a:gnu:grub:0.97:::::::* cpe:2.3:o:xen:xen:-:::::::* cpe:2.3:o:xen:xen:-:::::::*
CVSS3 Source	nvd@nist.gov
CVSS3 Type	Primary
CVSS3 Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H