{"id":"CVE-2018-5382","details":"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.","aliases":["GHSA-8477-3v39-ggpm"],"modified":"2026-04-09T06:20:59.211596Z","published":"2018-04-16T14:29:01.047Z","references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/103453"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:2927"},{"type":"ADVISORY","url":"https://www.bouncycastle.org/releasenotes.html"},{"type":"ADVISORY","url":"https://www.kb.cert.org/vuls/id/306792"},{"type":"ADVISORY","url":"https://www.oracle.com/security-alerts/cpuoct2020.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/bcgit/bc-java","events":[{"introduced":"0"},{"last_affected":"4f7f299340043738ff3a269724d4a9ab18e739d2"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.49"}]}}],"versions":["r1rv49"],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"6.4"}]},{"events":[{"introduced":"0"},{"last_affected":"6.4"}]}],"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-5382.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"}]}