CVEvulnerability

CVE-2020-26939

5.3 MEDIUM Published 2020-11-02 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-11-02
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:P/I:N/A:N
Weaknesses
CWE-203

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.

Affected configurations

• bouncycastle fips java api (< 1.0.1.2) • bouncycastle legion-of-the-bouncy-castle (< 1.61)

Related

Weakness · CWE (1)

  • CWE-203 Observable Discrepancy weakness

References