Bug 1900698 (CVE-2020-27779)
| Summary: | CVE-2020-27779 grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled | ||
|---|---|---|---|
| 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, lkundrak, pjanda, pjones, rhughes, security-response-team |
| 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 grub2. 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.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2021-03-03 01:02:11 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: | 1913912, 1913913, 1913914, 1913915, 1913916, 1913917, 1913918, 1913919, 1913920, 1913921, 1913922, 1932888, 1932889, 1932890, 1932891, 1932892, 1932893, 1932894, 1932895, 1932896, 1932897, 1932898, 1932899, 1932900, 1932901, 1932902, 1932903, 1932904, 1932905, 1932906, 1932907, 1932908, 1932909, 1932910, 1932912, 1932913, 1932915, 1932916, 1932918, 1934250, 1990907, 1990910, 1990915, 1990919, 1990921, 1990923 | ||
| Bug Blocks: | 1899965 | ||
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Description
Marco Benatto
2020-11-23 14:49:09 UTC
Created grub2 tracking bugs for this issue: Affects: fedora-all [bug 1934250] 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-2020-27779 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 |