Improper Authorization Affecting shim-aa64 package, versions <0:15.4-2.el8_1
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Test your applications- Snyk ID SNYK-RHEL8-SHIMAA64-4394556
- published 26 Jul 2021
- disclosed 2 Mar 2021
Introduced: 2 Mar 2021
CVE-2020-27779 Open this link in a new tabHow to fix?
Upgrade RHEL:8 shim-aa64 to version 0:15.4-2.el8_1 or higher.
This issue was patched in RHSA-2021:3675.
NVD Description
Note: Versions mentioned in the description apply only to the upstream shim-aa64 package and not the shim-aa64 package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2020-27779
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
- https://security.gentoo.org/glsa/202104-05
- https://bugzilla.redhat.com/show_bug.cgi?id=1900698
- https://security.netapp.com/advisory/ntap-20220325-0001/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/