Improper Access Control Affecting kernel-tools package, versions <0:4.18.0-193.14.3.el8_2
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Test your applications- Snyk ID SNYK-RHEL8-KERNELTOOLS-3770403
- published 26 Jul 2021
- disclosed 19 Aug 2019
Introduced: 19 Aug 2019
CVE-2019-20908 Open this link in a new tabHow to fix?
Upgrade RHEL:8 kernel-tools to version 0:4.18.0-193.14.3.el8_2 or higher.
This issue was patched in RHSA-2020:3218.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032.
References
- https://access.redhat.com/security/cve/CVE-2019-20908
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html
- http://www.openwall.com/lists/oss-security/2020/07/20/6
- http://www.openwall.com/lists/oss-security/2020/07/29/3
- http://www.openwall.com/lists/oss-security/2020/07/30/2
- http://www.openwall.com/lists/oss-security/2020/07/30/3
- https://access.redhat.com/errata/RHSA-2020:3218
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
- https://usn.ubuntu.com/4426-1/
- https://usn.ubuntu.com/4427-1/
- https://usn.ubuntu.com/4439-1/
- https://usn.ubuntu.com/4440-1/