VULNERABILITY INTELLIGENCE

CVE-2021-3505

CVSS score5.5 MEDIUM
EPSS probability0.40%
CISA KEVNot currently listed
Published2021-04-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

  • secalert@redhat.com: CWE-331

Primary references