CVEvulnerability
CVE-2019-20908
6.7 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2020-07-15
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.7 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
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.
Affected configurations
• linux linux kernel (< 5.4)
• opensuse leap 15.1
• canonical ubuntu linux 16.04
• canonical ubuntu linux 18.04
References
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/20/6 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/29/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/2 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/3 Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4 Release Notes, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e Patch, Vendor Advisory
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh Patch, Third Party Advisory
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html Mailing 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.html Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/20/6 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/29/3 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/2 Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2020/07/30/3 Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4 Release Notes, Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e Patch, Vendor Advisory
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh Patch, Third Party Advisory
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html Mailing 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