medium
5.3
CWE
125
Advisory Published
CVE Published
CVE Published
Updated

CVE-2023-4693: Grub2: out-of-bounds read at fs/ntfs.c

First published: Mon Sep 11 2023(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
ubuntu/grub2<2.12~
2.12~
ubuntu/grub2-unsigned<2.06-2ubuntu14.4
2.06-2ubuntu14.4
ubuntu/grub2-unsigned<2.06-2ubuntu14.4
2.06-2ubuntu14.4
ubuntu/grub2-unsigned<2.06-2ubuntu17.2
2.06-2ubuntu17.2
ubuntu/grub2-signed<1.187.6~20.04.1
1.187.6~20.04.1
ubuntu/grub2-signed<1.187.6
1.187.6
ubuntu/grub2-signed<1.193.2
1.193.2
debian/grub2<=2.06-3~deb10u1<=2.06-3~deb11u5<=2.06-13<=2.06-13+deb13u1
2.06-3~deb10u4
2.06-3~deb11u6
2.06-13+deb12u1
2.12~rc1-12
Gnu Grub2
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux=9.0
<2.12
=8.0
=9.0

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-4693?

    CVE-2023-4693 is a vulnerability in grub2 that allows a physically present attacker to read arbitrary memory locations by presenting a specially crafted NTFS file system image.

  • How can an attacker exploit CVE-2023-4693?

    An attacker can exploit CVE-2023-4693 by leveraging the out-of-bounds read vulnerability in grub2 and presenting a specially crafted NTFS file system image.

  • What is the severity of CVE-2023-4693?

    The severity of CVE-2023-4693 is high due to the potential for sensitive data leakage and memory access.

  • Which software versions are affected by CVE-2023-4693?

    The affected software versions include grub2 versions up to and excluding 2.12~, grub2-unsigned versions up to and excluding 2.06-2ubuntu14.4, grub2-unsigned versions up to and excluding 2.06-2ubuntu14.4, grub2-unsigned versions up to and excluding 2.06-2ubuntu17.2, grub2-signed versions up to and excluding 1.187.6~20.04.1, grub2-signed versions up to and excluding 1.187.6, and grub2-signed versions up to and excluding 1.193.2.

  • How can I fix CVE-2023-4693?

    To fix CVE-2023-4693, update to grub2 version 2.12~, grub2-unsigned version 2.06-2ubuntu14.4, grub2-unsigned version 2.06-2ubuntu14.4, grub2-unsigned version 2.06-2ubuntu17.2, grub2-signed version 1.187.6~20.04.1, grub2-signed version 1.187.6, or grub2-signed version 1.193.2, depending on the affected software package.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203