CVE-2021-3505 | BDVDB-2026-152254 Detail

libtpms

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.

Impact#

No impact statement in the source data.

Weaknesses#

CWE-331

References#

https://bugzilla.redhat.com/show_bug.cgi?id=1950046
https://github.com/stefanberger/libtpms/issues/183
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/

Exploit#

No public exploit known

History#

Version 12021-04-19Record published in the CVE List.
Version 22024-08-03Most recent update recorded in the CVE List.