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ubuntucveUbuntu.comUB:CVE-2021-3746
HistoryOct 19, 2021 - 12:00 a.m.

CVE-2021-3746

2021-10-1900:00:00
ubuntu.com
ubuntu.com
19
libtpms
buffer overflow
crafted packets
vulnerability
system availability

CVSS2

7.1

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:N/I:N/A:C

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

35.0%

A flaw was found in the libtpms code that may cause access beyond the
boundary of internal buffers. The vulnerability is triggered by
specially-crafted TPM2 command packets that then trigger the issue when the
state of the TPM2’s volatile state is written. The highest threat from this
vulnerability is to system availability. This issue affects libtpms
versions before 0.8.5, before 0.7.9 and before 0.6.6.

Bugs

CVSS2

7.1

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:M/Au:N/C:N/I:N/A:C

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.001

Percentile

35.0%