CVE-2021-3505

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Summary

CVECVE-2021-3505
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-04-19 21:15:00 UTC
Updated2023-11-07 03:38:00 UTC
DescriptionA 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.

Risk And Classification

Problem Types: CWE-331

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 33 All All All
Application Libtpms Project Libtpms All All All All
Operating System Redhat Enterprise Linux 8.0 All All All

References

ReferenceSourceLinkTags
1950046 – (CVE-2021-3505) CVE-2021-3505 libtpms: RSA keys weaker than expected MISC bugzilla.redhat.com
[SECURITY] Fedora 33 Update: libtpms-0.8.2-0.20210426git729fc6a4ca.fc33 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 33 Update: libtpms-0.8.2-0.20210426git729fc6a4ca.fc33 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
[libtpms 0.7] TPM2_CreatePrimary creates prime numbers with 32 zero bits · Issue #183 · stefanberger/libtpms · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 184150 Debian Security Update for libtpms (CVE-2021-3505)
  • 281253 Fedora Security Update for libtpms (FEDORA-2021-cfdc434610)

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