According to the versions of the grub2 packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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.(CVE-2020-27779)

  - A flaw was found in grub2 in versions prior to 2.06,     where it incorrectly enables the usage of the ACPI     command when Secure Boot is enabled. This flaw allows     an attacker with privileged access to craft a Secondary     System Description Table (SSDT) containing code to     overwrite the Linux kernel lockdown variable content     directly into memory. The table is further loaded and     executed by the kernel, defeating its Secure Boot     lockdown and allowing the attacker to load unsigned     code. The highest threat from this vulnerability is to     data confidentiality and integrity, as well as system     availability.(CVE-2020-14372)

  - A flaw was found in grub2 in versions prior to 2.06.
    The rmmod implementation allows the unloading of a     module used as a dependency without checking if any     other dependent module is still loaded leading to a     use-after-free scenario. This could allow arbitrary     code to be executed or a bypass of Secure Boot     protections. The highest threat from this vulnerability     is to data confidentiality and integrity as well as     system availability.(CVE-2020-25632)

  - A flaw was found in grub2 in versions prior to 2.06.
    The option parser allows an attacker to write past the     end of a heap-allocated buffer by calling certain     commands with a large number of specific short forms of     options. The highest threat from this vulnerability is     to data confidentiality and integrity as well as system     availability.(CVE-2021-20225)

  - A flaw was found in grub2 in versions prior to 2.06.
    Setparam_prefix() in the menu rendering code performs a     length calculation on the assumption that expressing a     quoted single quote will require 3 characters, while it     actually requires 4 characters which allows an attacker     to corrupt memory by one byte for each quote in the     input. The highest threat from this vulnerability is to     data confidentiality and integrity as well as system     availability.(CVE-2021-20233)

  - A flaw was found in grub2 in versions prior to 2.06.
    Variable names present are expanded in the supplied     command line into their corresponding variable     contents, using a 1kB stack buffer for temporary     storage, without sufficient bounds checking. If the     function is called with a command line that references     a variable with a sufficiently large payload, it is     possible to overflow the stack buffer, corrupt the     stack frame and control execution which could also     circumvent Secure Boot protections. The highest threat     from this vulnerability is to data confidentiality and     integrity as well as system     availability.(CVE-2020-27749)

  - A flaw was found in grub2 in versions prior to 2.06.
    During USB device initialization, descriptors are read     with very little bounds checking and assumes the USB     device is providing sane values. If properly exploited,     an attacker could trigger memory corruption leading to     arbitrary code execution allowing a bypass of the     Secure Boot mechanism. The highest threat from this     vulnerability is to data confidentiality and integrity     as well as system availability.(CVE-2020-25647)

  - ** RESERVED ** This candidate has been reserved by an     organization or individual that will use it when     announcing a new security problem. When the candidate     has been publicized, the details for this candidate     will be provided.(CVE-2020-17779)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Type	Severity
148618	EulerOS Virtualization 2.9.1 : grub2 (EulerOS-SA-2021-1714)	Nessus	Huawei Local Security Checks	Local	high
148577	EulerOS Virtualization 2.9.0 : grub2 (EulerOS-SA-2021-1741)	Nessus	Huawei Local Security Checks	Local	high

Detections

Analytics

CVE-2020-17779

No Score

Tenable Plugins

high

high