🛡️ CVE-2018-5382 — bcprov-jdk15on

⚪ Unknown ✅ No Known Exploit CWE-354 OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Improper Validation of Integrity Check Value in Bouncy Castle

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability none.

Weakness class

CVE-2018-5382 is classified as CWE-354: Improper Validation of Integrity Check Value. A checksum or integrity value is not verified properly, so tampered data passes as intact.

Affected software

CVE-2018-5382 is recorded against 1 package.

  • org.bouncycastle:bcprov-jdk15on (fixed in 1.50)

Timeline and source

Published on 13 May 2022 and last revised on 8 November 2023. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
access.redhat.com (Web)
www.bouncycastle.org (Web)
www.kb.cert.org (Web)
www.oracle.com (Web)
www.securityfocus.com (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CWE CWE-354
Public Exploit ✅ No
Source OSV
Published 2022-05-13
Updated 2026-08-12
Modified 2023-11-08
Fix URL N/A

Affected Packages

Software From version Fixed in
org.bouncycastle:bcprov-jdk15on — 1.50

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