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CVE-2020-26939
Good to know:
Date: November 2, 2020
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.
Language: Java
Severity Score
Related Resources (8)
Severity Score
Weakness Type (CWE)
Observable Discrepancy
CWE-203Top Fix
Upgrade Version
Upgrade to version 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
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | LOW |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | LOW |
| Integrity (I): | NONE |
| Availability (A): | NONE |
CVSS v2
| Base Score: |
|
|---|---|
| Access Vector (AV): | NETWORK |
| Access Complexity (AC): | LOW |
| Authentication (AU): | NONE |
| Confidentiality (C): | PARTIAL |
| Integrity (I): | NONE |
| Availability (A): | NONE |
| Additional information: |