GLSA-202311-14 : GRUB: Multiple Vulnerabilities

The remote host is affected by the vulnerability described in GLSA-202311-14 GRUB: Multiple Vulnerabilities - A buffer overflow was found in grubfontconstructglyph. A malicious crafted pf2 font can lead to an overflow when calculating the maxglyphsize value, allocating a smaller than needed buffe...

CLSA-2023-1700164193 grub2: Fix of CVE-2023-4692

CVE-2023-4692: ntfs: checks to ensure that NTFS drive's sector numbers are never written beyond the boundary...

CLSA-2023-1700161520 grub2: Fix of CVE-2023-4692

CVE-2023-4692: ntfs: checks to ensure that NTFS drive's sector numbers are never written beyond the boundary...

The vulnerability of the Grub configuration file, related to default access rights settings, allows a perpetrator to gain access to confidential data.

The vulnerability of the Grub configuration file is related to the default access rights settings. Exploiting this vulnerability can allow an attacker to gain access to confidential data...

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...

DEBIAN-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...

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...

Memory corruption

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...

CVE-2023-4949 Memory Corruption Vulnerability in Grub-Legacy's XFS Implementation

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...

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...

CVE-2023-4949 Memory Corruption Vulnerability in Grub-Legacy's XFS Implementation

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...

CVE-2023-4949

CVE-2023-4949 involves a memory corruption vulnerability in grub-legacy’s XFS filesystem handling when a modified XFS partition is presented to grub by an attacker with local system access. Affected component: grub-legacy’s XFS file system implementation (via libfsimage/pygrub code paths). Impact...

Xen Buffer Error Vulnerability

Xen is an open source virtual machine monitor product from the University of Cambridge, UK. The product enables different and incompatible operating systems to run on the same computer and supports runtime migration to ensure uptime and avoid downtime. Xen has a security vulnerability that stems...

Grub2: out-of-bounds read at fs/ntfs.c

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DEBIAN-CVE-2023-4692

An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a...

AZL-34795 CVE-2023-4692 affecting package grub2 for versions less than 2.06-18

An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a specially crafted NTFS filesystem image, leading to grub's heap metadata corruption. In some circumstances, the attack may also corrupt the UEFI firmware heap metadata. As a...

OESA-2023-1720 grub2 security update

GNU GRUB is a Multiboot boot loader. It was derived from GRUB, the GRand Unified Bootloader, which was originally designed and implemented by Erich Stefan Boleyn. Security Fixes: An out-of-bounds write flaw was found in grub2's NTFS filesystem driver. This issue may allow an attacker to present a...

Multiple vulnerabilities in libfsimage disk handling

ISSUE DESCRIPTION libfsimage contains parsing code for several filesystems, most of them based on grub-legacy code. libfsimage is used by pygrub to inspect guest disks. Pygrub runs as the same user as the toolstack root in a priviledged domain. At least one issue has been reported to the Xen...

A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

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A crafted JPEG image may lead the JPEG reader to underflow its data pointer allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

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