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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 DSA signature generation is vulnerable to timing attack. Where timings can be closely observed for the generation of signatures, the lack of blinding in 1.55, or earlier, may allow an attacker to gain information about the signature's k value and ultimately the private value as well.

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 5.9/10
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/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-r9ch-m4fh-fc7q - CC BY 4.0

Vulnerability history: org.bouncycastle:bcprov-jdk15on

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 (25) in the archive
Total entries
25
First → latest
10.2018 04.2026
Without a fix
3
Exploited in attacks
0

Severity breakdown

  • Critical 2
  • High 8
  • 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 <= 1.7.0 no fix
  2. Logic error in Legion of the Bouncy Castle BC Java
    High · 8.1 CVE-2020-28052 >= 1.65, < 1.67 1.67
  3. In Bouncy Castle JCE Provider the DHIES implementation allowed the use of ECB mode
    High · 7.4 CVE-2016-1000344 < 1.56 1.56
  4. In Bouncy Castle JCE Provider the ECIES implementation allowed the use of ECB mode
    High · 7.4 CVE-2016-1000352 < 1.56 1.56
  5. 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
  6. 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
  7. Moderate severity vulnerability that affects org.bouncycastle:bcprov-jdk14 and org.bouncycastle:bcprov-jdk15 this entry
    Medium · 5.9 CVE-2016-1000341 < 1.56 1.56
  8. The Bouncy Castle JCE Provider carry a propagation bug
    High · 7.5 CVE-2016-1000340 >= 1.51, < 1.56 1.56
  9. 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
  10. Deserialization of Untrusted Data in Bouncy castle
    Critical · 9.8 CVE-2018-1000613 >= 1.57, < 1.60 1.60
  11. 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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