PT-2021-4260 · Unknown+5 · Tpm2-Tools+5
Guilherme De Almeida Suckevicz
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Published
2021-05-26
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Updated
2024-06-15
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CVE-2021-3565
CVSS v3.1
5.9
Medium
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
tpm2-tools versions prior to 5.1.1
tpm2-tools versions prior to 4.3.2
Description
The issue is related to the use of a fixed AES key for internal wrapping in tpm2-tools, which could allow a remote attacker to access confidential data. Specifically, the
tpm2 import function used a fixed AES key for the inner wrapper, potentially allowing a Man-In-The-Middle (MITM) attacker to unwrap the inner portion and reveal the key being imported. The highest threat from this issue is to data confidentiality.Recommendations
For versions prior to 5.1.1, update to version 5.1.1 or later to resolve the issue.
For versions prior to 4.3.2, update to version 4.3.2 or later to resolve the issue.
As a temporary workaround, consider restricting access to the
tpm2 import function until a patch is available.Fix
Information Disclosure
Improper Initialization
Using Hardcoded Credentials
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Related Identifiers
Affected Products
Almalinux
Centos
Red Hat
Rocky Linux
Suse
Tpm2-Tools