CVE-2021-3505

CVSS V2 Low 2.1 CVSS V3 Medium 5.5
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.
Overview
  • CVE ID
  • CVE-2021-3505
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-04-19T21:15:13
  • Last Modified Date
  • 2021-06-03T16:19:12
Weakness Enumerations
CWE URL
CWE-331 http://cwe.mitre.org/data/definitions/331.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:libtpms_project:libtpms:*:*:*:*:*:*:*:* 1 OR 0.8.0
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:advanced_virtualization:*:*:* 1 OR
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:P/I:N/A:N
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 2.1
  • Severity
  • LOW
  • Exploitability Score
  • 3.9
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 5.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=1950046 Issue Tracking Patch Third Party Advisory
https://github.com/stefanberger/libtpms/issues/183 Exploit Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NUCZX4S53TUNTSGTCRDNOQZV2V2RI4RJ/ Mailing List Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-3505
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3505
History
Created Old Value New Value Data Type Notes
2022-05-10 16:13:44 Added to TrackCVE
2022-12-06 02:08:40 2021-04-19T21:15Z 2021-04-19T21:15:13 CVE Published Date updated
2022-12-06 02:08:40 2021-06-03T16:19:12 CVE Modified Date updated
2022-12-06 02:08:40 Analyzed Vulnerability Status updated