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Medium

Moderate severity vulnerability that affects org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15

  • Disclosed: 17.10.2018
  • Updated: 11.10.2026 12:22

In the Bouncy Castle JCE Provider version 1.55 and earlier the primary engine class used for AES was AESFastEngine. Due to the highly table driven approach used in the algorithm it turns out that if the data channel on the CPU can be monitored the lookup table accesses are sufficient to leak information on the AES key being used. There was also a leak in AESEngine although it was substantially less. AESEngine has been modified to remove any signs of leakage (testing carried out on Intel X86-64) and is now the primary AES class for the BC JCE provider from 1.56. Use of AESFastEngine is now only recommended where otherwise deemed appropriate.

Affected software

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PlatformPackageVulnerable versionsFixed in
Java / Kotlin (Maven) org.bouncycastle:bcprov-jdk14 < 1.56 1.56
Java / Kotlin (Maven) org.bouncycastle:bcprov-jdk15 < 1.56 1.56
Java / Kotlin (Maven) org.bouncycastle:bcprov-jdk15on < 1.56 1.56

References

CVSS score 5.3/10
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE)
-
Platform
Java / Kotlin (Maven)
Package
org.bouncycastle:bcprov-jdk14, org.bouncycastle:bcprov-jdk15, org.bouncycastle:bcprov-jdk15on
Disclosed
17.10.2018
Updated
11.10.2026 12:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-c8xf-m4ff-jcxj - CC BY 4.0

Vulnerability history: org.bouncycastle:bcprov-jdk14

All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (26) in the archive
Total entries
26
First → latest
10.2018 04.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • Critical 1
  • High 10
  • Medium 14
  • Low 1

Disclosures per year

Severity:
  1. Bouncy Castle for Java GOST 28147 CTR mode reuses keystream after 255 blocks
    Critical · 7.5 CVE-2025-14813 >= 1.59, <= 1.80.1, >= 1.82, < 1.84, = 1.81.0 1.84
  2. Bouncy Castle Has Covert Timing Channel Vulnerability
    High CVE-2026-5598 >= 1.81, < 1.81.1 1.81.1
  3. Logic error in Legion of the Bouncy Castle BC Java
    High · 8.1 CVE-2020-28052 >= 1.65, < 1.67 1.67
  4. Out-of-Memory Error in Bouncy Castle Crypto
    High · 7.5 CVE-2019-17359 >= 1.63, < 1.64 1.64
  5. In Bouncy Castle JCE Provider the DHIES implementation allowed the use of ECB mode
    High · 7.4 CVE-2016-1000344 < 1.56 1.56
  6. In Bouncy Castle JCE Provider the ECIES implementation allowed the use of ECB mode
    High · 7.4 CVE-2016-1000352 < 1.56 1.56
  7. In Bouncy Castle JCE Provider the DSA key pair generator generates a weak private key if used with default values
    High · 7.5 CVE-2016-1000343 < 1.56 1.56
  8. In Bouncy Castle JCE Provider ECDSA does not fully validate ASN.1 encoding of signature on verification
    High · 7.5 CVE-2016-1000342 < 1.56 1.56
  9. The Bouncy Castle JCE Provider carry a propagation bug
    High · 7.5 CVE-2016-1000340 >= 1.51, < 1.56 1.56
  10. Moderate severity vulnerability that affects org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15 this entry
    Medium · 5.3 CVE-2016-1000339 < 1.56 1.56
  11. In Bouncy Castle JCE Provider it is possible to inject extra elements in the sequence making up the signature and still have it validate
    High · 7.5 CVE-2016-1000338 >= 1.38, < 1.56 1.56
  12. Bouncy Castle has a flaw in the Low-level interface to RSA key pair generator
    High · 7.5 CVE-2018-1000180 < 1.60 1.60

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