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CVE-2020-11933

local snapd exploit through cloud-init

CVSS 7.3 HIGHEPSS 0.2%CWE-264
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7.3EPSS 0.2%KEV nãoPoC Nuclei Metasploit Patch
Lifecycle
29 Jul 2020Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

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