CVE-2020-20949
STM32Cube RSA Padding Vulnerability
Description
Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in STM32 cryptographic firmware library software expansion for STM32Cube (UM1924). The vulnerability can allow one to use Bleichenbacher's oracle attack to decrypt an encrypted ciphertext by making successive queries to the server using the vulnerable library, resulting in remote information disclosure.
INFO
Published Date :
Jan. 20, 2021, 4:15 p.m.
Last Modified :
July 21, 2021, 11:39 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
Affected Products
The following products are affected by CVE-2020-20949
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-2020-20949.
| URL | Resource |
|---|---|
| http://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf | Technical Description Third Party Advisory |
| http://st.com | Product |
| http://x-cube-cryptolib.com | Broken Link |
| https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb | Technical Description Third Party Advisory |
| https://www.st.com/en/embedded-software/x-cube-cryptolib.html | 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-2020-20949 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-20949 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 -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-326 CWE-327 -
Initial Analysis by [email protected]
Feb. 02, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Changed Reference Type http://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf No Types Assigned http://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf Technical Description, Third Party Advisory Changed Reference Type http://st.com No Types Assigned http://st.com Product Changed Reference Type http://x-cube-cryptolib.com No Types Assigned http://x-cube-cryptolib.com Broken Link Changed Reference Type https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb No Types Assigned https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb Technical Description, Third Party Advisory Changed Reference Type https://www.st.com/en/embedded-software/x-cube-cryptolib.html No Types Assigned https://www.st.com/en/embedded-software/x-cube-cryptolib.html Third Party Advisory Added CWE NIST CWE-326 Added CPE Configuration OR *cpe:2.3:a:st:stm32cubef0:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubef1:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubef2:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubef3:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubef4:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubef7:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubeg0:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubeg4:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubeh7:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubeide:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubel0:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubel1:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubel4:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubel4\+:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubel5:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubemonitor:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubemp1:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubemx:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubeprogrammer:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubewb:-:*:*:*:*:*:*:* *cpe:2.3:a:st:stm32cubewl:-:*:*:*:*:*:*:* Added CPE Configuration OR *cpe:2.3:a:ietf:public_key_cryptography_standards_\#1:1.5:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-20949 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-2020-20949
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.18 }} 0.03%
score
0.56422
percentile