CVE-2020-24455

Publication date 26 February 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Missing initialization of a variable in the TPM2 source may allow a privileged user to potentially enable an escalation of privilege via local access. This affects tpm2-tss before 3.0.1 and before 2.4.3.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
tpm2-tss	20.10 groovy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

How can I get the fixes?
What do statuses mean?

Severity score breakdown

Parameter	Value
Base score	6.7 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

MITRE
NVD
Launchpad
Debian

Other references

https://github.com/tpm2-software/tpm2-tss/commit/0cc5f0e12694f3780a8512fc37a7dbc542ea4330 (master)
https://github.com/tpm2-software/tpm2-tss/commit/9536b79cd5a13884a7e4de7a571f72530180c20b (3.0.1)
https://github.com/tpm2-software/tpm2-tss/commit/bf24b0ef0fa8de9300a323f70a097a1afd818439 (2.4.5)
https://www.cve.org/CVERecord?id=CVE-2020-24455