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CVE-2020-26939

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published11/2/2020

Last Modified7/17/2025

Sourcenvd

Honeypot Sightings0

Affected Products

bouncycastle:fips_java_apibouncycastle:legion-of-the-bouncy-castle

Weaknesses (CWE)

CWE-203

References

https://github.com/bcgit/bc-java/wiki/CVE-2020-26939(cve@mitre.org)

https://lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e%40%3Cissues.solr.apache.org%3E(cve@mitre.org)

https://github.com/bcgit/bc-java/wiki/CVE-2020-26939(af854a3a-2127-422b-91ae-364da2661108)

https://lists.apache.org/thread.html/r8c36ba34e80e05eecb1f80071cc834d705616f315b634ec0c7d8f42e%40%3Cissues.solr.apache.org%3E(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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