Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| n/a / n/a | affected n/a |
CWE
No CWE identifiers supplied.
References
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
- http://www.openwall.com/lists/oss-security/2020/07/20/6
- https://usn.ubuntu.com/4427-1/
- http://www.openwall.com/lists/oss-security/2020/07/29/3
- http://www.openwall.com/lists/oss-security/2020/07/30/3
- http://www.openwall.com/lists/oss-security/2020/07/30/2
- https://usn.ubuntu.com/4439-1/
- https://usn.ubuntu.com/4426-1/
- https://usn.ubuntu.com/4440-1/
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html
ADP enrichment
No English description supplied.
- https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh
- https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
- http://www.openwall.com/lists/oss-security/2020/07/20/6
- https://usn.ubuntu.com/4427-1/
- http://www.openwall.com/lists/oss-security/2020/07/29/3
- http://www.openwall.com/lists/oss-security/2020/07/30/3
- http://www.openwall.com/lists/oss-security/2020/07/30/2
- https://usn.ubuntu.com/4439-1/
- https://usn.ubuntu.com/4426-1/
- https://usn.ubuntu.com/4440-1/
- http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html