CVE-2020-36475
Mbed TLS Denial of Service Vulnerability
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.
INFO
Published Date :
Aug. 23, 2021, 2:15 a.m.
Last Modified :
Jan. 11, 2023, 5 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Affected Products
The following products are affected by CVE-2020-36475
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-36475.
| URL | Resource |
|---|---|
| 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 | Mailing List Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-36475 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-36475 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Jan. 11, 2023
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html Mailing List, Third Party Advisory Changed CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Dec. 26, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/12/msg00036.html [No Types Assigned] -
Modified Analysis by [email protected]
Nov. 26, 2021
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html No Types Assigned https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html Mailing List, Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 23, 2021
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html [No Types Assigned] -
Modified Analysis by [email protected]
Sep. 16, 2021
Action Type Old Value New Value Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf Patch, Third Party Advisory Added CPE Configuration AND OR *cpe:2.3:o:siemens:logo\!_cmr2020_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.2 OR cpe:2.3:h:siemens:logo\!_cmr2020:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:logo\!_cmr2040_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.2 OR cpe:2.3:h:siemens:logo\!_cmr2040:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3031c_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3031c:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3041c_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3041c:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3030c_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3030c:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_rtu3000c_firmware:*:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_rtu3000c:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Sep. 14, 2021
Action Type Old Value New Value Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-756638.pdf [No Types Assigned] -
Initial Analysis by [email protected]
Aug. 26, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9 No Types Assigned https://github.com/ARMmbed/mbedtls/releases/tag/v2.16.9 Release Notes, Third Party Advisory Changed Reference Type https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0 No Types Assigned https://github.com/ARMmbed/mbedtls/releases/tag/v2.25.0 Release Notes, Third Party Advisory Changed Reference Type https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18 No Types Assigned https://github.com/ARMmbed/mbedtls/releases/tag/v2.7.18 Release Notes, Third Party Advisory Added CWE NIST CWE-131 Added CPE Configuration OR *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions up to (excluding) 2.7.18 *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions from (including) 2.8.0 up to (excluding) 2.16.9 *cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* versions from (including) 2.17.0 up to (excluding) 2.25.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-36475 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-36475
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
1.07 }} 0.29%
score
0.84467
percentile