Bouncy Castle BKS-V1 keystore files vulnerable to trivial hash collisions (Legion of the Bouncy Castle Bouncy Castle)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.26 % · percentile 18 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- certcc
- NVD status
- Modified
Description
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.
Weaknesses (CWE)
- CWE-327 — Use of a Broken or Risky Cryptographic Algorithm
- CWE-354 — Improper Validation of Integrity Check Value
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 4.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | LOW 3.6 | AV:L/AC:L/Au:N/C:P/I:P/A:N | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-8477-3v39-ggpm — Improper Validation of Integrity Check Value in Bouncy Castle
European references
- ENISA EUVD · EUVD-2022-3099
- GCVE · GCVE-0-2018-5382
CERT-FR advisories
- CERTFR-2020-AVI-420 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*≤ 1.49cpe:2.3:a:redhat:satellite:6.4:*:*:*:*:*:*:*cpe:2.3:a:redhat:satellite_capsule:6.4:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Legion of the Bouncy Castle · Bouncy Castle | affected all < 1.47 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |