UBUNTU-CVE-2019-20908
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.
02 / AFFECTED SOFTWARE
Affected packages
41 explicit affected versions
6 explicit affected versions
23 explicit affected versions
6 explicit affected versions
46 explicit affected versions
27 explicit affected versions
1 explicit affected versions
53 explicit affected versions
23 explicit affected versions
1 explicit affected versions
1 explicit affected versions
7 explicit affected versions
1 explicit affected versions
18 explicit affected versions
3 explicit affected versions
10 explicit affected versions
26 explicit affected versions
25 explicit affected versions
12 explicit affected versions
9 explicit affected versions
43 explicit affected versions
1 explicit affected versions
22 explicit affected versions
23 explicit affected versions
6 explicit affected versions
11 explicit affected versions
46 explicit affected versions
50 explicit affected versions
51 explicit affected versions
4 explicit affected versions
59 explicit affected versions
1 explicit affected versions
4 explicit affected versions
4 explicit affected versions
28 explicit affected versions
44 explicit affected versions
14 explicit affected versions
26 explicit affected versions
9 explicit affected versions
38 explicit affected versions
8 explicit affected versions
72 explicit affected versions
36 explicit affected versions
31 explicit affected versions
12 explicit affected versions
4 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- 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
- https://ubuntu.com/security/CVE-2019-20908
- https://ubuntu.com/security/notices/USN-4426-1
- https://ubuntu.com/security/notices/USN-4427-1
- https://ubuntu.com/security/notices/USN-4439-1
- https://ubuntu.com/security/notices/USN-4440-1
- https://www.cve.org/CVERecord?id=CVE-2019-20908
- https://www.openwall.com/lists/oss-security/2020/06/14/1