CVE-2020-36475

CVSS V2 Medium 5 CVSS V3 High 7.5
Description
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.
Overview
  • CVE ID
  • CVE-2020-36475
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-08-23T02:15:06
  • Last Modified Date
  • 2023-01-11T17:00:44
Weakness Enumerations
CWE URL
CWE-131 http://cwe.mitre.org/data/definitions/131.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* 1 OR 2.7.18
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* 1 OR 2.8.0 2.16.9
cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* 1 OR 2.17.0 2.25.0
AND
cpe:2.3:o:siemens:logo\!_cmr2020_firmware:*:*:*:*:*:*:*:* 1 OR 2.2
cpe:2.3:h:siemens:logo\!_cmr2020:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:logo\!_cmr2040_firmware:*:*:*:*:*:*:*:* 1 OR 2.2
cpe:2.3:h:siemens:logo\!_cmr2040:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_rtu3031c_firmware:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_rtu3031c:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_rtu3041c_firmware:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_rtu3041c:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_rtu3030c_firmware:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_rtu3030c:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:siemens:simatic_rtu3000c_firmware:*:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:siemens:simatic_rtu3000c:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:L/Au:N/C:N/I:N/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • NONE
  • Availability Impact
  • PARTIAL
  • Base Score
  • 5
  • Severity
  • MEDIUM
  • Exploitability Score
  • 10
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • HIGH
  • Base Score
  • 7.5
  • Base Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf Patch Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9 Release Notes Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0 Release Notes Third Party Advisory
https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18 Release Notes Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2020-36475
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36475
History
Created Old Value New Value Data Type Notes
2022-05-10 06:44:52 Added to TrackCVE
2022-12-05 08:41:20 2021-08-23T02:15Z 2021-08-23T02:15:06 CVE Published Date updated
2022-12-05 08:41:20 2021-11-26T21:35:52 CVE Modified Date updated
2022-12-05 08:41:20 Analyzed Vulnerability Status updated
2022-12-26 04:13:32 2022-12-26T03:15:10 CVE Modified Date updated
2022-12-26 04:13:32 Analyzed Modified Vulnerability Status updated
2022-12-26 04:13:33 References updated
2022-12-27 17:12:41 Modified Undergoing Analysis Vulnerability Status updated
2023-01-12 05:12:42 2023-01-11T17:00:44 CVE Modified Date updated
2023-01-12 05:12:42 Undergoing Analysis Analyzed Vulnerability Status updated