Vulnerability · Published Jun 4, 2021 · Assigned by redhat
CVE-2021-3565
Medium 5.9
In plain English
A medium-severity security flaw in tpm2-tools. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.9Medium
Exploit odds (30 days)1.3%top 28.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A flaw was found in tpm2-tools in versions before 5.1.1 and before 4.3.2. tpm2_import used a fixed AES key for the inner wrapper, potentially allowing a MITM attacker to unwrap the inner portion and reveal the key being imported. The highest threat from this vulnerability is to data confidentiality.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | tpm2-tools | 4.1.1-5.el8 | ALSA-2021:4413 |
| Debian:12 | tpm2-tools | 5.0-2 | DEBIAN-CVE-2021-3565 |
| Debian:13 | tpm2-tools | 5.0-2 | DEBIAN-CVE-2021-3565 |
| Debian:14 | tpm2-tools | 5.0-2 | DEBIAN-CVE-2021-3565 |
| Rocky Linux:8 | tpm2-tools | 0:4.1.1-5.el8 | RLSA-2021:4413 |
| Ubuntu:22.04:LTS | tpm2-tools | no fix listed | UBUNTU-CVE-2021-3565 |
| Ubuntu:24.04:LTS | tpm2-tools | no fix listed | UBUNTU-CVE-2021-3565 |
| Ubuntu:25.10 | tpm2-tools | no fix listed | UBUNTU-CVE-2021-3565 |
| Ubuntu:26.04:LTS | tpm2-tools | no fix listed | UBUNTU-CVE-2021-3565 |
| Ubuntu:26.10 | tpm2-tools | no fix listed | UBUNTU-CVE-2021-3565 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | tpm2-tools | tpm2-tools 5.1.1, tpm2-tools 4.3.2 |
Weakness: CWE-665
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1964427 x_refsource_MISC
- FEDORA-2021-00a15ad850 vendor-advisory, x_refsource_FEDORA
- FEDORA-2021-c970c02748 vendor-advisory, x_refsource_FEDORA