CVE-2021-3505

Name	CVE-2021-3505
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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libtpms (PTS)	bookworm (security)	0.9.2-3.1~deb12u1	fixed
	trixie, sid, bookworm	0.9.2-3.1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libtpms	source	(unstable)	0.8.0~dev1-1

Notes

https://github.com/stefanberger/libtpms/issues/183
https://github.com/stefanberger/libtpms/commit/625171be0c8225824740b5d0fb7e8562f6a1c6a8 (v0.8.0)
https://github.com/stefanberger/libtpms/commit/c1f7bf55099fcd427715aa65e130475c6e836a6b (v0.8.0)