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CVE-2020-27779

Status Candidate

Overview

A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Related Files

Red Hat Security Advisory 2021-0701-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0701-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | 7414ff24c1c6b8bd45da5b75de65b7b5
Red Hat Security Advisory 2021-0700-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0700-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | e1092492203235201d9202c7773db9a9
Red Hat Security Advisory 2021-0699-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0699-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | 46adb797f1a2a375676777f91bd2707c
Red Hat Security Advisory 2021-0702-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0702-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | bb807c0ca2a5e8950e4b826150306278
Red Hat Security Advisory 2021-0704-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0704-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | 8d90132cb5c5758420ea2326d3d3af2b
Red Hat Security Advisory 2021-0703-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0703-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | afa2e983baabff4428efd55913f63f65
Red Hat Security Advisory 2021-0697-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0697-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | 4cb1ed985ca6f84ebdb6fab7882238ff
Red Hat Security Advisory 2021-0696-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0696-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | e9ba2558554aa1730adf9136916c6928
Red Hat Security Advisory 2021-0698-01
Posted Mar 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0698-01 - 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. Issues addressed include buffer overflow, out of bounds write, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-14372, CVE-2020-25632, CVE-2020-25647, CVE-2020-27749, CVE-2020-27779, CVE-2021-20225, CVE-2021-20233
MD5 | f19a88eeebd608835c6f056d9303e450
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