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AlienVault OTX Malware

grub2

An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This issue may allow a physically present attacker to present a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack allows sensitive data cached in memory or EFI variable values to be leaked, presenting a high Confidentiality risk.

CVE-2023-4693 is a medium-severity vulnerability identified in the grub2 bootloader's NTFS filesystem driver on Red Hat Enterprise Linux 8. The flaw is an out-of-bounds read, which occurs when grub2 processes a specially crafted NTFS filesystem image. This vulnerability allows an attacker with physical access to the machine to cause grub2 to read memory beyond the intended buffer boundaries. The consequence is the potential disclosure of sensitive information stored in memory, including cached data and EFI (Extensible Firmware Interface) variable values. EFI variables often contain critical boot configuration and security parameters, so their exposure can have significant confidentiality implications. The attack vector is local (physical presence required), with high attack complexity and requiring high privileges, but no user interaction is needed. The vulnerability does not affect system integrity or availability, focusing solely on confidentiality. No public exploits have been reported, and no patches are linked in the provided data, but Red Hat typically addresses such issues promptly. The vulnerability affects Red Hat Enterprise Linux 8 systems using grub2 with NTFS support, which is common in dual-boot or recovery scenarios. The CVSS v3.1 score is 5.3, reflecting the medium severity due to the local and privileged nature of the exploit and the confidentiality impact.

Detailed information about CVE-2023-4693: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 8 affecting Red Hat Red Hat Enterprise Linux 8. Get real-time u

CVE-2023-4693: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 8 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-4693: Out-of-bounds Read in Red Hat Red Hat Enterprise Linux 8

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