CVE-2018-5382

lowpriority · track · 18OT risk · elevatedEPSS 0.003 · 17 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.26% (17th) EPSS

CVSS 3.6 · low

Is it mine?

5 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-24

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.

cvss

Technical severity, 0–10. One row per scoring source.

4.4

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.6–4.4

v2.03.6lowAV:L/AC:L/Au:N/C:P/I:P/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 4.9

v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Nprimary · NVD / NIST USexploitability 1.8 · impact 2.5

v3.14.4mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:Nsecondary · OSV

v3.14.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-354USprimaryCWE-327USCWE-354US

affected products (5)

Products and version ranges known to be affected.

Legion of the Bouncy Castle Bouncy Castleall → 1.47enisa_euvdEU
bouncycastle bc-java≤ 1.49nvdUScpe:2.3:a:bouncycastle:bc-java:*:*:*:*:*:*:*:*
redhat satellite= 6.4nvdUScpe:2.3:a:redhat:satellite:*:*:*:*:*:*:*:*
redhat satellite capsule= 6.4nvdUScpe:2.3:a:redhat:satellite_capsule:*:*:*:*:*:*:*:*
Maven org.bouncycastle:bcprov-jdk15on< 1.50osvUSpkg:maven/org.bouncycastle/bcprov-jdk15on

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-8477-3v39-ggpmImproper Validation of Integrity Check Value in Bouncy Castle2022-05-13ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2018-04-16modified 2026-06-17

related (409)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2023-48795US	medium5.9OT high	93.5% (100th)	Exploit	2023-12-18
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packet…
CVE-2024-3596US	critical9.0OT high	14.9% (97th)	Exploit	2024-07-09
RADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid Response (Access-Accept, Access-Reject, or Access-Challenge) to any ot…
CVE-2023-33668US	critical9.8	0.52% (43rd)	Exploit	2023-07-12
DigiExam up to v14.0.2 lacks integrity checks for native modules, allowing attackers to access PII and takeover accounts on shared computers.
CVE-2019-1166US	medium5.9	68.1% (99th)	—	2019-10-10
A tampering vulnerability exists in Microsoft Windows when a man-in-the-middle attacker is able to successfully bypass the NTLM MIC (Message Integrity Check) protection, aka 'Windo…
CVE-2026-49230US	critical9.1	0.30% (21st)	Exploit	2026-06-19
Improper Validation of Integrity Check Value vulnerability in Apache APISIX. The jwe-decrypt plugin under default configuration is vulnerable to authentication bypass. This issue…

+404 more

references (20)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan