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CVE-2021-3981

Status Candidate

Overview

A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong permission set allowing non privileged users to read its content. This represents a low severity confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg. This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no version with the fix is currently released.

Related Files

Ubuntu Security Notice USN-6355-1
Posted Sep 8, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6355-1 - Daniel Axtens discovered that specially crafted images could cause a heap-based out-of-bonds write. A local attacker could possibly use this to circumvent secure boot protections. Daniel Axtens discovered that specially crafted images could cause out-of-bonds read and write. A local attacker could possibly use this to circumvent secure boot protections. Daniel Axtens discovered that specially crafted images could cause buffer underwrite which allows arbitrary data to be written to a heap. A local attacker could possibly use this to circumvent secure boot protections.

tags | advisory, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2021-3695, CVE-2021-3696, CVE-2021-3697, CVE-2021-3981, CVE-2022-28733, CVE-2022-28734, CVE-2022-28735, CVE-2022-28736, CVE-2022-28737, CVE-2022-3775
SHA-256 | c68601357ce389f48c2c2aed91b14822cc8a3b09a8f0b6538ffabaab39253206
Gentoo Linux Security Advisory 202209-12
Posted Sep 26, 2022
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202209-12 - Multiple vulnerabilities have been discovered in GRUB, the worst of which may allow for secureboot bypass. Versions less than 2.06 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
advisories | CVE-2021-3695, CVE-2021-3696, CVE-2021-3697, CVE-2021-3981, CVE-2022-28733, CVE-2022-28734, CVE-2022-28735, CVE-2022-28736, CVE-2022-28737
SHA-256 | 6ed9c7fcb103a96def8481a7caf238738ec32577a4a9992f019f98348d8786ac
Red Hat Security Advisory 2022-5006-01
Posted Jun 19, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-5006-01 - Red Hat OpenShift Service Mesh is Red Hat's distribution of the Istio service mesh project, tailored for installation into an on-premise OpenShift Container Platform installation. This advisory covers the RPM packages for the release. Issues addressed include a traversal vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2018-25032, CVE-2021-25219, CVE-2021-3634, CVE-2021-3737, CVE-2021-38185, CVE-2021-3981, CVE-2021-4189, CVE-2021-43813, CVE-2022-1154, CVE-2022-1271, CVE-2022-1650, CVE-2022-23772, CVE-2022-23773, CVE-2022-23806, CVE-2022-24675, CVE-2022-24785, CVE-2022-28327, CVE-2022-29224, CVE-2022-29225, CVE-2022-29226, CVE-2022-29228, CVE-2022-31045
SHA-256 | 6f6ba67471416e8a7e06343894cacbc3dcadc86799322067063a37ae1ba3d122
Red Hat Security Advisory 2022-2110-01
Posted May 11, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-2110-01 - The grub2 packages provide version 2 of the Grand Unified Boot Loader, a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-3981
SHA-256 | 78a5d3eabf050e4cfed97bbd2723a1ba8f9280371bd305e134463c7ed7c9afb2
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