CVE-2021-3505
medium
CVSS v3
—
CVSS v2
—
VIR risk
5.5
Description
A flaw was found in libtpms in versions before 0.8.0. The TPM 2 implementation returns 2048 bit keys with ~1984 bit strength due to a bug in the TCG specification. The bug is in the key creation algorithm in RsaAdjustPrimeCandidate(), which is called before the prime number check. The highest threat from this vulnerability is to data confidentiality.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-3505
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-3505.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 0.8.0-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 0.8.0~dev1-1 |
| debian | forky | fixed | 0.8.0~dev1-1 |
| debian | sid | fixed | 0.8.0~dev1-1 |
| debian | trixie | fixed | 0.8.0~dev1-1 |
References
Verify integrity in audit chain (admin only). AS-IS.