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CVE-2020-20950

Published: Jan 19, 2021Updated: Jul 9, 2026 Sources: CVE List NVDCWE-327
5.9MEDIUM
NVD MITRE
EPSS Score
0.9%
Top 44.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

Bleichenbacher's attack on PKCS #1 v1.5 padding for RSA in Microchip Libraries for Applications 2018-11-26 All up to 2018-11-26. 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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-327

Affected Products

ietf
oss-project
public key cryptography standards \#1On-prem
Networking Infrastructure / dns-dhcp-ntp
microchip
commercial·USaka microchip technology
microchip libraries for applications
Hardware Firmware
and 1 more affected products View all →

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

http://archiv.infsec.ethz.ch/education/fs08/secsem/bleichenbacher98.pdf
archiv.infsec.ethz.ch
https://www.microchip.com/mplab/microchip-libraries-for-applications
microchip.com
https://bi-zone.medium.com/silence-will-fall-or-how-it-can-take-2-years-to-get-your-vuln-registered-e6134846f5bb
bi-zone.medium.com

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