CVE-2020-26939 (Medium) detected in bcprov-jdk15on-1.55.jar

[mend-bolt-for-github]

CVE-2020-26939 - Medium Severity Vulnerability

Vulnerable Library - bcprov-jdk15on-1.55.jar

The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8.

Library home page: http:https://www.bouncycastle.org/java.html

Path to dependency file: Websocket-Smart-Card-Signer/pom.xml

Path to vulnerable library: 20210223130700_TYMBKW/downloadResource_MYVJAY/20210223130710/bcprov-jdk15on-1.55.jar

Dependency Hierarchy:

• ❌ bcprov-jdk15on-1.55.jar (Vulnerable Library)

Found in HEAD commit: 52e62821fe1c04f561516a02e367c9391f940eef

Found in base branch: master

Vulnerability Details

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.

Publish Date: 2020-11-02

URL: CVE-2020-26939

CVSS 3 Score Details (5.3)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: None
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://github.com/bcgit/bc-java/wiki/CVE-2020-26939

Release Date: 2020-10-11

Fix Resolution: org.bouncycastle:bcprov-jdk14:1.61,org.bouncycastle:bcprov-ext-debug-jdk15on:1.61,org.bouncycastle:bcprov-debug-jdk15on:1.61,org.bouncycastle:bcprov-ext-jdk15on:1.61,org.bouncycastle:bcprov-jdk15on:1.61

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