The default BKS keystore use an HMAC that is only 16 bits long, which can allow an attacker to compromise the integrity of a BKS keystore. Bouncy Castle release 1.47 changes the BKS format to a format which uses a 160 bit HMAC instead. This applies to any BKS keystore generated prior to BC 1.47. For situations where people need to create the files for legacy reasons a specific keystore type "BKS-V1" was introduced in 1.49. It should be noted that the use of "BKS-V1" is discouraged by the library authors and should only be used where it is otherwise safe to do so, as in where the use of a 16 bit checksum for the file integrity check is not going to cause a security issue in itself.
Advisories
Source ID Title
EUVD EUVD EUVD-2022-3099 The default BKS keystore use an HMAC that is only 16 bits long, which can allow an attacker to compromise the integrity of a BKS keystore. Bouncy Castle release 1.47 changes the BKS format to a format which uses a 160 bit HMAC instead. This applies to any BKS keystore generated prior to BC 1.47. For situations where people need to create the files for legacy reasons a specific keystore type "BKS-V1" was introduced in 1.49. It should be noted that the use of "BKS-V1" is discouraged by the library authors and should only be used where it is otherwise safe to do so, as in where the use of a 16 bit checksum for the file integrity check is not going to cause a security issue in itself.
Github GHSA Github GHSA GHSA-8477-3v39-ggpm Improper Validation of Integrity Check Value in Bouncy Castle
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 12 May 2025 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Bouncycastle bc-java
CPEs cpe:2.3:a:bouncycastle:legion-of-the-bouncy-castle-java-crytography-api:*:*:*:*:*:*:*:* cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*
Vendors & Products Bouncycastle legion-of-the-bouncy-castle-java-crytography-api
Bouncycastle bc-java

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2024-09-16T16:27:56.228Z

Reserved: 2018-01-12T00:00:00

Link: CVE-2018-5382

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2018-04-16T14:29:01.047

Modified: 2025-05-12T17:37:16.527

Link: CVE-2018-5382

cve-icon Redhat

Severity : Low

Publid Date: 2012-03-30T00:00:00Z

Links: CVE-2018-5382 - Bugzilla

cve-icon OpenCVE Enrichment

No data.