Vulnerability Details CVE-2020-20949
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 51.0%
CVSS Severity
CVSS v3 Score 5.9
CVSS v2 Score 4.3
References
- http://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf
- http://st.com
- http://x-cube-cryptolib.com
- https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb
- https://www.st.com/en/embedded-software/x-cube-cryptolib.html
- http://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf
- http://st.com
- http://x-cube-cryptolib.com
- https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb
- https://www.st.com/en/embedded-software/x-cube-cryptolib.html
Products affected by CVE-2020-20949
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cpe:2.3:a:ietf:public_key_cryptography_standards_#1:1.5
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cpe:2.3:a:st:stm32cubef0:-
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cpe:2.3:a:st:stm32cubef1:-
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cpe:2.3:a:st:stm32cubef2:-
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cpe:2.3:a:st:stm32cubef3:-
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cpe:2.3:a:st:stm32cubef4:-
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cpe:2.3:a:st:stm32cubef7:-
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cpe:2.3:a:st:stm32cubeg0:-
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cpe:2.3:a:st:stm32cubeg4:-
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cpe:2.3:a:st:stm32cubeh7:-
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cpe:2.3:a:st:stm32cubeide:-
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cpe:2.3:a:st:stm32cubel0:-
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cpe:2.3:a:st:stm32cubel1:-
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cpe:2.3:a:st:stm32cubel4+:-
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cpe:2.3:a:st:stm32cubel4:-
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cpe:2.3:a:st:stm32cubel5:-
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cpe:2.3:a:st:stm32cubemonitor:-
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cpe:2.3:a:st:stm32cubemp1:-
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cpe:2.3:a:st:stm32cubemx:-
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cpe:2.3:a:st:stm32cubeprogrammer:-
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cpe:2.3:a:st:stm32cubewb:-
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cpe:2.3:a:st:stm32cubewl:-