Bug 1873150 (CVE-2020-14372)
| Summary: | CVE-2020-14372 grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled | ||
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| Product: | [Other] Security Response | Reporter: | Marco Benatto <mbenatto> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | bootloader-eng-team, fmartine, jobselko, jsvoboda, lkundrak, pjanda, pjones, pkotvan, rhughes, security-response-team, sparks |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | grub 2.06 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in GRUB 2, 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 kernel further loads and executes the table, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-03-03 01:01:49 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1875569, 1875570, 1875571, 1875572, 1875573, 1875574, 1875575, 1875576, 1875577, 1875578, 1875579, 1892149, 1892150, 1928892, 1932403, 1932404, 1932405, 1932406, 1932408, 1932409, 1932410, 1932411, 1932412, 1932413, 1932414, 1932415, 1932416, 1932417, 1932418, 1932419, 1932420, 1932421, 1932422, 1932423, 1932508, 1932509, 1932510, 1932511, 1932512, 1932513, 1932514, 1932516, 1932517, 1932518, 1933044, 1933045, 1933059, 1934223, 1991041, 1991042, 1991045, 1991046, 1991047, 1991048 | ||
| Bug Blocks: | 1871995 | ||
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Description
Marco Benatto
2020-08-27 14:00:00 UTC
Acknowledgments: Name: Máté Kukri Marking fwupdate as WONTFIX for all RHEL8 streams. This package was replaced was replaced by fwupd. External References: https://access.redhat.com/security/vulnerabilities/RHSB-2021-003 Statement: For a successful attack to occur, the attacker needs to triage the environment to determine where the lockdown variable symbol is placed into memory when the kernel is loaded, and then the SSDT table needs to be written accordingly into this memory position and the grub.cfg file needs to be changed to load the table during the boot time. Created grub2 tracking bugs for this issue: Affects: fedora-all [bug 1934223] This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:0698 https://access.redhat.com/errata/RHSA-2021:0698 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:0696 https://access.redhat.com/errata/RHSA-2021:0696 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:0697 https://access.redhat.com/errata/RHSA-2021:0697 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.3 Advanced Update Support Via RHSA-2021:0703 https://access.redhat.com/errata/RHSA-2021:0703 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.2 Advanced Update Support Via RHSA-2021:0704 https://access.redhat.com/errata/RHSA-2021:0704 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.4 Advanced Update Support Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions Red Hat Enterprise Linux 7.4 Telco Extended Update Support Via RHSA-2021:0702 https://access.redhat.com/errata/RHSA-2021:0702 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:0699 https://access.redhat.com/errata/RHSA-2021:0699 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Extended Update Support Via RHSA-2021:0700 https://access.redhat.com/errata/RHSA-2021:0700 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.6 Extended Update Support Via RHSA-2021:0701 https://access.redhat.com/errata/RHSA-2021:0701 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-14372 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:1734 https://access.redhat.com/errata/RHSA-2021:1734 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:2566 https://access.redhat.com/errata/RHSA-2021:2566 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:2790 https://access.redhat.com/errata/RHSA-2021:2790 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:3675 https://access.redhat.com/errata/RHSA-2021:3675 |