CVE-2020-36478

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). A NULL algorithm parameters entry looks identical to an array of REAL (size zero) and thus the certificate is considered valid. However, if the parameters do not match in any way, then the certificate should be considered invalid.
Overview
  • CVE ID
  • CVE-2020-36478
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-08-23T02:15:07
  • Last Modified Date
  • 2023-01-11T17:01:16
Weakness Enumerations
CWE URL
CWE-295 http://cwe.mitre.org/data/definitions/295.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:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • NONE
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • 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:H/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • NONE
  • Availability Impact
  • NONE
  • 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/issues/3629 Exploit 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-2020-36478
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36478
History
Created Old Value New Value Data Type Notes
2022-05-10 06:44:52 Added to TrackCVE
2022-12-05 08:41:31 2021-08-23T02:15Z 2021-08-23T02:15:07 CVE Published Date updated
2022-12-05 08:41:31 2021-11-26T21:35:45 CVE Modified Date updated
2022-12-05 08:41:31 Analyzed Vulnerability Status updated
2022-12-26 04:13:33 2022-12-26T03:15:11 CVE Modified Date updated
2022-12-26 04:13:33 Analyzed Modified Vulnerability Status updated
2022-12-26 04:13:33 References updated
2022-12-27 17:12:42 Modified Undergoing Analysis Vulnerability Status updated
2023-01-12 05:12:42 2023-01-11T17:01:16 CVE Modified Date updated
2023-01-12 05:12:42 Undergoing Analysis Analyzed Vulnerability Status updated