CVE-2021-3505

Medium

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.

SeverityMedium

CVSS5.5

Exploit probability—

Product

Libtpms

PublishedApr 19, 2021

First seenApr 19, 2021

Weakness typeCWE-331CWE-331

How to fix

Update

libtpms_project libtpms0.8.0 or later

Vendor advisories

lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/

Affected products

Product	Affected versions	Fixed in
libtpms_project libtpms	v < 0.8.0	0.8.0
redhat enterprise_linux	8.0	—
fedoraproject fedora	33	—

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