Description
In Legion of the Bouncy Castle BC before 1.61 and BC-FJA before 1.0.1.2, attackers can obtain sensitive information about a private exponent because of Observable Differences in Behavior to Error Inputs. This occurs in org.bouncycastle.crypto.encodings.OAEPEncoding. Sending invalid ciphertext that decrypts to a short payload in the OAEP Decoder could result in the throwing of an early exception, potentially leaking some information about the private exponent of the RSA private key performing the encryption.
Remediation
References
https://github.com/bcgit/bc-java/wiki/CVE-2020-26939
https://lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e%40%3Cissues.solr.apache.org%3E
Related Vulnerabilities
CVE-2021-33605 Vulnerability in maven package com.vaadin:vaadin-checkbox-flow
CVE-2018-20433 Vulnerability in maven package c3p0:c3p0
CVE-2019-14862 Vulnerability in maven package org.webjars:knockout
CVE-2021-3827 Vulnerability in maven package org.keycloak:keycloak-services
CVE-2023-36542 Vulnerability in maven package org.apache.nifi:nifi-hadoop-dbcp-service