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ubuntucveUbuntu.comUB:CVE-2020-36475
HistoryAug 23, 2021 - 12:00 a.m.

CVE-2020-36475

2021-08-2300:00:00
ubuntu.com
ubuntu.com
18
mbed tls
denial of service
diffie-hellman

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.008

Percentile

81.5%

An issue was discovered in Mbed TLS before 2.25.0 (and before 2.16.9 LTS
and before 2.7.18 LTS). The calculations performed by mbedtls_mpi_exp_mod
are not limited; thus, supplying overly large parameters could lead to
denial of service when generating Diffie-Hellman key pairs.

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.008

Percentile

81.5%