Medium severity · published May 4, 2018
CVE-2017-3775
Some Lenovo System x server BIOS/UEFI versions, when Secure Boot mode is enabled by a system administrator, do not properly authenticate signed code before booting it
6.4
CVSS
0.3%
EPSS
No
On KEV
Description
Some Lenovo System x server BIOS/UEFI versions, when Secure Boot mode is enabled by a system administrator, do not properly authenticate signed code before booting it. As a result, an attacker with physical access to the system could boot unsigned code.
CVSS vector
CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Physical
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 19% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SL
Some Lenovo Flex System and Lenovo System x products · Lenovo Group Ltd.
Affected BIOS version varies by product · source: vendor
FS
Flex System X240 M5 Bios · Lenovo
before 2.61 · source: NVD
FS
Flex System X280 X6 Bios · Lenovo
before 4.21 · source: NVD
FS
Flex System X480 X6 Bios · Lenovo
before 4.21 · source: NVD
FS
Flex System X880 Bios · Lenovo
before 4.21 · source: NVD
NN
Nextscale Nx360 M5 Bios · Lenovo
before 2.61 · source: NVD
SX
System X3250 M6 Bios · Lenovo
before 2.23 · source: NVD
SX
System X3500 M5 Bios · Lenovo
before 2.61 · source: NVD
SX
System X3550 M5 Bios · Lenovo
before 2.61 · source: NVD
SX
System X3650 M5 Bios · Lenovo
before 2.61 · source: NVD
SX
System X3850 X6 Bios · Lenovo
before 4.3 · source: NVD
SX
System X3950 X6 Bios · Lenovo
before 4.3 · source: NVD
Affected product
SL
Some Lenovo Flex System and Lenovo System x products
Lenovo Group Ltd.