CVE-2019-20908
Summary
| CVE | CVE-2019-20908 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-07-15 22:15:00 UTC |
| Updated | 2021-07-21 11:39:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: NVD-CWE-noinfo
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Canonical | Ubuntu Linux | 16.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 18.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 16.04 | All | All | All |
| Operating System | Canonical | Ubuntu Linux | 18.04 | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
| Operating System | Linux | Linux Kernel | All | All | All | All |
| Operating System | Opensuse | Leap | 15.1 | All | All | All |
| Operating System | Opensuse | Leap | 15.1 | All | All | All |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| oss-security - multiple secure boot grub2 and linux kernel vulnerabilities | MLIST | www.openwall.com | Mailing List, Third Party Advisory |
| USN-4426-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| oss-security - Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar | MLIST | www.openwall.com | Mailing List, Third Party Advisory |
| cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4 | MISC | cdn.kernel.org | Release Notes, Vendor Advisory |
| USN-4440-1: linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| oss-security - UEFI SecureBoot bypass fixes rolled out to kernels below radar | MLIST | www.openwall.com | Mailing List, Third Party Advisory |
| american-unsigned-language.sh - american-unsigned-language - Disable kernel lockdown using ACPI SSDT injection | MISC | git.zx2c4.com | Patch, Third Party Advisory |
| [oss-security] lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modules | MISC | mailarchives.bentasker.co.uk | Mailing List, Third Party Advisory |
| USN-4439-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| kernel/git/torvalds/linux.git - Linux kernel source tree | MISC | git.kernel.org | Patch, Vendor Advisory |
| USN-4427-1: Linux kernel vulnerabilities | Ubuntu security notices | Ubuntu | UBUNTU | usn.ubuntu.com | Third Party Advisory |
| [security-announce] openSUSE-SU-2020:1153-1: important: Security update | SUSE | lists.opensuse.org | Mailing List, Third Party Advisory |
| oss-security - Re: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modules | MLIST | www.openwall.com | Mailing List, Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.