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HIGH

bouncycastle: DSA does not fully validate ASN.1 encoding during signature verification allowing for injection of unsigned data

Published Jun 1, 2018

Description

In Bouncy Castle JCE Provider version 1.55 and earlier the DSA does not fully validate ASN.1 encoding of signature on verification. It is possible to inject extra elements in the sequence making up the signature and still have it validate, which in some cases may allow the introduction of 'invisible' data into a signed structure.

Affected products

Remediation

Red Hat statement

This issue affects the versions of bouncycastle as shipped with Red Hat Subscription Asset Manager 1.x. Red Hat Product Security has rated this issue as having a security impact of Moderate. No update is planned for this product at this time. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Metrics

Weaknesses (2)

CWE-325

CWE-347

References (14)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jun 1, 2018
Updated Aug 6, 2024
Reserved Jun 1, 2018
Link CVE-2016-1000338
CISA Vulnrichment
Updated n/a
NVD
Status Analyzed
Modified Jun 17, 2026
Link CVE-2016-1000338
Red Hat
Severity Moderate
Public date Oct 15, 2016
Links CVE-2016-1000338 - Bugzilla
GHSA-4VHJ-98R6-424H