The remote Ubuntu 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6355-1 advisory.

    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. (CVE-2021-3695)

    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. (CVE-2021-3696)

    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. (CVE-2021-3697)

    It was discovered that GRUB2 configuration files were created with the wrong permissions. An attacker     could possibly use this to leak encrypted passwords. (CVE-2021-3981)

    Daniel Axtens discovered that specially crafted IP packets could cause an integer underflow and write past     the end of a buffer. An attacker could possibly use this to circumvent secure boot protections.
    (CVE-2022-28733)

    Daniel Axtens discovered that specially crafted HTTP headers can cause an out-of-bounds write of a NULL     byte. An attacker could possibly use this to corrupt GRUB2's internal data. (CVE-2022-28734)

    Julian Andres Klode discovered that GRUB2 shim_lock allowed non- kernel files to be loaded. A local attack     could possibly use this to circumvent secure boot protections. (CVE-2022-28735)

    Chris Coulson discovered that executing chainloaders more than once caused a use-after-free vulnerability.
    A local attack could possibly use this to circumvent secure boot protections. (CVE-2022-28736)

    Chris Coulson discovered that specially crafted executables could cause shim to make out-of-bound writes.
    A local attack could possibly use this to circumvent secure boot protections. (CVE-2022-28737)

    Zhang Boyang discovered that specially crafted unicode sequences could lead to an out-of-bounds write to a     heap. A local attacker could possibly use this to circumvent secure boot protections. (CVE-2022-3775)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

Ubuntu 20.04 LTS / 22.04 LTS : GRUB2 vulnerabilities (USN-6355-1)

high Nessus Plugin ID 181178

Version 1.2

Version 1.1

Version 1.0

Version 1.2 Aug 28, 2024, 7:43 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202408281943
Version 1.1 Jan 17, 2024, 2:38 PM CVSSv3 score source (changed from "CVE-2022-28734" to "CVE-2022-28733") CVSS metrics ("CVSSv3 score" set to 8.1. "CVSSv3 vector" set to "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H") Plugin Feed: 202401171438
Version 1.0 Sep 8, 2023, 8:11 AM New Plugin Feed: 202309080811