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ubuntucveUbuntu.comUB:CVE-2021-3505
HistoryApr 19, 2021 - 12:00 a.m.

CVE-2021-3505

2021-04-1900:00:00
ubuntu.com
ubuntu.com
12
libtpms
tpm 2
keys
tcg
bug
data confidentiality
unix

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

21.7%

JSON

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.

Related

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Security Bulletin: This Power System update is being released to address CVE-2021-3505
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Fedora: Security Advisory for libtpms (FEDORA-2021-cfdc434610)
2021-05-05 00:00:00
Mageia: Security Advisory (MGASA-2021-0590)
2022-01-28 00:00:00
fedora
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[SECURITY] Fedora 33 Update: libtpms-0.8.2-0.20210426git729fc6a4ca.fc33
2021-05-05 00:54:10
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RHEL 8 : av_libtpms (Unpatched Vulnerability)
2024-06-03 00:00:00
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2024-05-11 00:00:00
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mageia
Updated libtpms/swtpm packages fix security vulnerability
2021-12-30 19:41:51

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS

0.001

Percentile

21.7%

JSON
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