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.
2018-04-16T14:29:01.047
2025-05-12T17:37:16.527
Modified
CVSSv3.1: 4.4 (MEDIUM)
AV:L/AC:L/Au:N/C:P/I:P/A:N
3.9
4.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | bouncycastle | bc-java | ≤ 1.49 | Yes |
| Application | redhat | satellite | 6.4 | Yes |
| Application | redhat | satellite_capsule | 6.4 | Yes |