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.
References (2)
Core 2
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/bcgit/bc-java/wiki/CVE-2020-26939
Mailing List mailing-list
x_refsource_mlist
https://lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e%40%3Cissues.solr.apache.org%3E
Scores
CVSS v3
5.3
EPSS
0.0091
EPSS Percentile
55.2%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Details
CWE
CWE-203
Status
published
Products (10)
bouncycastle/fips_java_api
< 1.0.1.2
bouncycastle/legion-of-the-bouncy-castle
< 1.61
org.bouncycastle/bc-fips
0 - 1.0.2Maven
org.bouncycastle/bcprov-ext-jdk15on
0 - 1.61Maven
org.bouncycastle/bcprov-ext-jdk16
0 - 1.61Maven
org.bouncycastle/bcprov-jdk14
0 - 1.61Maven
org.bouncycastle/bcprov-jdk15
0 - 1.61Maven
org.bouncycastle/bcprov-jdk15on
0 - 1.61Maven
org.bouncycastle/bcprov-jdk15to18
0 - 1.61Maven
org.bouncycastle/bcprov-jdk16
0 - 1.61Maven
Published
Nov 02, 2020
Tracked Since
Feb 18, 2026