CVE-2023-4693
published 2023-10-25CVE-2023-4693: 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…
PriorityP422medium4.6CVSS 3.1
AVPACLPRNUINSUCHINAN
EPSS
0.50%
39.6th percentile
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.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | grub2 | < grub2 2.06-13+deb12u1 (bookworm) | grub2 2.06-13+deb12u1 (bookworm) |
| gnu | grub2 | < 2.12 | 2.12 |
| gnu | grub2 | >= 0 < 2.06-3~deb11u6 | 2.06-3~deb11u6 |
| gnu | grub2 | >= 0 < 2.06-13+deb12u1 | 2.06-13+deb12u1 |
| gnu | grub2 | >= 0 < 2.12~rc1-11 | 2.12~rc1-11 |
| gnu | grub2 | >= 0 < 2.12~rc1-11 | 2.12~rc1-11 |
| msrc | azl3_grub2_2.06-18_on_azure_linux_3.0 | — | — |
| msrc | azl3_grub2_2.06-23_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_grub2_2.06-13_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| redhat | enterprise_linux | — | — |
| redhat | enterprise_linux | — | — |
CVSS provenance
nvdv3.14.6MEDIUMCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
osv7.8HIGH
vendor_ubuntu7.5HIGH
vendor_debian5.3MEDIUM
vendor_redhat5.3MEDIUM
vendor_msrc4.6MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-r62p-gp92-7444: An out-of-bounds read flaw was found on grub2's NTFS filesystem driver
ghsa_unreviewed·2023-10-25
CVE-2023-4693 [MEDIUM] CWE-125 GHSA-r62p-gp92-7444: An out-of-bounds read flaw was found on grub2's NTFS filesystem driver
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.
OSV
CVE-2023-4693: An out-of-bounds read flaw was found on grub2's NTFS filesystem driver
osv·2023-10-25·CVSS 4.6
CVE-2023-4693 [MEDIUM] CVE-2023-4693: An out-of-bounds read flaw was found on grub2's NTFS filesystem driver
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.
OSV
grub2-signed, grub2-unsigned vulnerabilities
osv·2023-10-04·CVSS 7.8
CVE-2023-4692 [HIGH] grub2-signed, grub2-unsigned vulnerabilities
grub2-signed, grub2-unsigned vulnerabilities
It was discovered that a specially crafted file system image could cause a
heap-based out-of-bounds write. A local attacker could potentially use this
to perform arbitrary code execution bypass and bypass secure boot
protections. (CVE-2023-4692)
It was discovered that a specially crafted file system image could cause an
out-of-bounds read. A physically-present attacker could possibly use this
to leak sensitive information to the GRUB pager. (CVE-2023-4693)
Microsoft
Grub2: out-of-bounds read at fs/ntfs.c
vendor_msrc·2023-10-10·CVSS 4.6
CVE-2023-4693 [MEDIUM] CWE-125 Grub2: out-of-bounds read at fs/ntfs.c
Grub2: out-of-bounds read at fs/ntfs.c
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
redhat: redhat
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.microsoft.com/
Ubuntu
GRUB2 vulnerabilities
vendor_ubuntu·2023-10-04·CVSS 7.5
CVE-2023-4692 [HIGH] GRUB2 vulnerabilities
Title: GRUB2 vulnerabilities
Summary: Several security issues were fixed in GRUB2.
It was discovered that a specially crafted file system image could cause a
heap-based out-of-bounds write. A local attacker could potentially use this
to perform arbitrary code execution bypass and bypass secure boot
protections. (CVE-2023-4692)
It was discovered that a specially crafted file system image could cause an
out-of-bounds read. A physically-present attacker could possibly use this
to leak sensitive information to the GRUB pager. (CVE-2023-4693)
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
grub2: out-of-bounds read at fs/ntfs.c
vendor_redhat·2023-10-03·CVSS 5.3
CVE-2023-4693 [MEDIUM] CWE-125 grub2: out-of-bounds read at fs/ntfs.c
grub2: out-of-bounds read at fs/ntfs.c
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.
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.
Statement: This vulnerability is considered as 'Low' severit
Debian
CVE-2023-4693: grub2 - An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This iss...
vendor_debian·2023·CVSS 5.3
CVE-2023-4693 [MEDIUM] CVE-2023-4693: grub2 - An out-of-bounds read flaw was found on grub2's NTFS filesystem driver. This iss...
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.
Scope: local
bookworm: resolved (fixed in 2.06-13+deb12u1)
bullseye: resolved (fixed in 2.06-3~deb11u6)
forky: resolved (fixed in 2.12~rc1-11)
sid: resolved (fixed in 2.12~rc1-11)
trixie: resolved (fixed in 2.12~rc1-11)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2023-52592 kernel: libbpf: Fix NULL pointer dereference in bpf_object__collect_prog_relos
bugzilla·2024-03-06
CVE-2023-52592 [LOW] CVE-2023-52592 kernel: libbpf: Fix NULL pointer dereference in bpf_object__collect_prog_relos
CVE-2023-52592 kernel: libbpf: Fix NULL pointer dereference in bpf_object__collect_prog_relos
In the Linux kernel, the following vulnerability has been resolved:
libbpf: Fix NULL pointer dereference in bpf_object__collect_prog_relos
The Linux kernel CVE team has assigned CVE-2023-52592 to this issue.
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024030645-CVE-2023-52592-4693@gregkh/T
Discussion:
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 2268322]
---
This was fixed for Fedora with the 6.7.4 stable kernel updates.
---
This CVE has been marked as Rejected by Upstream. Reference - https://lore.kernel.org/linux-cve-announce/2024030645-CVE-2023-52592-4693@gregkh/T/#t
---
The result of automatic check (that is developed by Alexander Larkin
Bugzilla
CVE-2023-4693 grub2: out-of-bounds read at fs/ntfs.c
bugzilla·2023-09-11·CVSS 4.6
CVE-2023-4693 [MEDIUM] CVE-2023-4693 grub2: out-of-bounds read at fs/ntfs.c
CVE-2023-4693 grub2: out-of-bounds read at fs/ntfs.c
There an out-of-bounds read at fs/ntfs.c, a physically present attacker may leverage that by presenting a specially crafted NTFS file system image to read arbitrary memory locations. A successful attack may allow sensitive data cached in memory or EFI variables values to be leaked presenting a high Confidentiality risk.
Discussion:
Created grub2 tracking bugs for this issue:
Affects: fedora-all [bug 2241976]
---
Upstream patch for this issue:
https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00030.html
---
This is duplicating https://issues.redhat.com/browse/RHEL-11569 which is now set to RELEASE PENDING. I believe this can be closed.
---
This issue has been addressed in the following products:
Red Hat Enterprise Linux
Bugzilla
CVE-2023-4380 Ansible Automation platform: token exposed at importing project
bugzilla·2023-08-16·CVSS 6.3
CVE-2023-4380 [MEDIUM] CVE-2023-4380 Ansible Automation platform: token exposed at importing project
CVE-2023-4380 Ansible Automation platform: token exposed at importing project
This issue has been addressed in the following products:
Red Hat Ansible Automation Platform 2.4 for RHEL 8
Red Hat Ansible Automation Platform 2.4 for RHEL 9
Via RHSA-2023:4693 https://access.redhat.com/errata/RHSA-2023:4693
Discussion:
When importing a project with incorrect credentials leads to credentials being logged in plain text.
---
> A logic flaw exists in Ansible. Whenever a private project is created with incorrect credentials,
So.. not an Ansible, but rather in "Red Hat Ansible Automation Platform".
---
not in Ansible** :)
---
Corrected thank you.
---
Why am I needinfo'd?
https://access.redhat.com/errata/RHSA-2024:2456https://access.redhat.com/errata/RHSA-2024:3184https://access.redhat.com/security/cve/CVE-2023-4693https://bugzilla.redhat.com/show_bug.cgi?id=2238343https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlhttps://seclists.org/oss-sec/2023/q4/37https://access.redhat.com/errata/RHSA-2024:2456https://access.redhat.com/errata/RHSA-2024:3184https://access.redhat.com/security/cve/CVE-2023-4693https://bugzilla.redhat.com/show_bug.cgi?id=2238343https://dfir.ru/2023/10/03/cve-2023-4692-cve-2023-4693-vulnerabilities-in-the-grub-boot-manager/https://lists.debian.org/debian-lts-announce/2023/10/msg00007.htmlhttps://lists.fedoraproject.org/archives/list/[email protected]/message/FUU42E7CPYLATXOYVYNW6YTXXULAOV6L/https://lists.fedoraproject.org/archives/list/[email protected]/message/OIRJ5UZRXX2KLR4IKBJEQUNGOCXMMDLY/https://lists.fedoraproject.org/archives/list/[email protected]/message/PERFILCHFEUGG3OAMC6W55P6DDIBZK4Q/https://lists.gnu.org/archive/html/grub-devel/2023-10/msg00028.htmlhttps://seclists.org/oss-sec/2023/q4/37https://security.gentoo.org/glsa/202311-14https://security.netapp.com/advisory/ntap-20231208-0002/
2023-10-25
Published