Microchip Libraries for Applications 2018-11-26 PKCS information disclosure

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CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

A vulnerability classified as problematic has been found in Microchip Libraries for Applications 2018-11-26. This affects some unknown functionality of the component PKCS Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The weakness was presented 01/19/2021. The advisory is shared at bi-zone.medium.com. This vulnerability is uniquely identified as CVE-2020-20950 since 08/13/2020. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.8

VulDB Base Score: 3.7
VulDB Temp Score: 3.7
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.9
NVD Vector: 🔒

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Information disclosure
CWE: CWE-200
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat: 🔍
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Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

08/13/2020 CVE assigned
01/19/2021 +159 days Advisory disclosed
01/19/2021 +0 days VulDB entry created
02/15/2021 +27 days VulDB last update

Sourcesinfoedit

Advisory: bi-zone.medium.com
Status: Not defined
Confirmation: 🔒

CVE: CVE-2020-20950 (🔒)

Entryinfoedit

Created: 01/19/2021 07:50 PM
Updated: 02/15/2021 10:35 AM
Changes: (18) vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai vulnerability_cvss3_meta_basescore vulnerability_cvss3_meta_tempscore vulnerability_cvss2_nvd_basescore vulnerability_cvss3_nvd_basescore
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