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CVE
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CVE-2020-11933Date: (C)2020-07-30   (M)2023-12-22


cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass intended security mechanisms such as full disk encryption. This issue did not affect traditional Ubuntu systems. Fixed in snapd version 2.45.2, revision 8539 and core version 2.45.2, revision 9659.

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 6.8CVSS Score : 4.6
Exploit Score: 0.9Exploit Score: 3.9
Impact Score: 5.9Impact Score: 6.4
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: PHYSICALAccess Vector: LOCAL
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: PARTIAL
Scope: UNCHANGEDIntegrity: PARTIAL
Confidentiality: HIGHAvailability: PARTIAL
Integrity: HIGH 
Availability: HIGH 
  
Reference:
https://launchpad.net/bugs/1879530
https://ubuntu.com/USN-4424-1

CPE    2
cpe:/o:canonical:ubuntu_linux:18.04::~~lts~~~
cpe:/o:canonical:ubuntu_linux:16.04::~~lts~~~
OVAL    3
oval:org.secpod.oval:def:67039
oval:org.secpod.oval:def:118483
oval:org.secpod.oval:def:705543

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