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Logic error in Legion of the Bouncy Castle BC Java

High severity GitHub Reviewed Published Apr 30, 2021 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

maven org.bouncycastle:bcprov-ext-jdk15on (Maven)

Affected versions

>= 1.65, < 1.67

Patched versions

1.67
maven org.bouncycastle:bcprov-ext-jdk16 (Maven)
>= 1.65, < 1.67
1.67
maven org.bouncycastle:bcprov-jdk14 (Maven)
>= 1.65, < 1.67
1.67
maven org.bouncycastle:bcprov-jdk15 (Maven)
>= 1.65, < 1.67
1.67
maven org.bouncycastle:bcprov-jdk15on (Maven)
>= 1.65, < 1.67
1.67
maven org.bouncycastle:bcprov-jdk15to18 (Maven)
>= 1.65, < 1.67
1.67
maven org.bouncycastle:bcprov-jdk16 (Maven)
>= 1.65, < 1.67
1.67

Description

An issue was discovered in Legion of the Bouncy Castle BC Java 1.65 and 1.66. The OpenBSDBCrypt.checkPassword utility method compared incorrect data when checking the password, allowing incorrect passwords to indicate they were matching with previously hashed ones that were different.

References

Published by the National Vulnerability Database Dec 18, 2020
Reviewed Mar 19, 2021
Published to the GitHub Advisory Database Apr 30, 2021
Last updated Jan 27, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.402%
(74th percentile)

Weaknesses

CVE ID

CVE-2020-28052

GHSA ID

GHSA-73xv-w5gp-frxh

Source code

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