VulnerabilityModified
CVE-2019-20908
Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032.
MEDIUM 6.7EPSS 0.51%
Does this matter?
Lower severity and a low EPSS score (0.51%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 6.7 MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.51% probability · 42th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel · opensuse/leap · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/20/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/3Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4Release Notes, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06ePatch, Vendor Advisory
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.shPatch, Third Party Advisory
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4426-1/Third Party Advisory
- https://usn.ubuntu.com/4427-1/Third Party Advisory
- https://usn.ubuntu.com/4439-1/Third Party Advisory
- https://usn.ubuntu.com/4440-1/Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.htmlMailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/20/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/2Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/3Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4Release Notes, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06ePatch, Vendor Advisory
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.shPatch, Third Party Advisory
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4426-1/Third Party Advisory
- https://usn.ubuntu.com/4427-1/Third Party Advisory
- https://usn.ubuntu.com/4439-1/Third Party Advisory
- https://usn.ubuntu.com/4440-1/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.