CVE-2016-1000338 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://access.redhat.com/errata/RHSA-2018:2669 https://access.redhat.com/errata/RHSA-2018:2927 https://github.com/bcgit/bc-java/commit/b0c3ce99d43d73a096268831d0d120ffc89eac7fdiff-3679f5a9d2b939d0d3ee1601a7774fb0 https://lists.apache.org/thread.html/708d94141126eac03011144a971a6411fcac16d9c248d1d535a39451@3Csolr-user.lucene.apache.org3E https://lists.debian.org/debian-lts-announce/2018/07/msg00009.html https://usn.ubuntu.com/3727-1/ https://www.oracle.com/security-alerts/cpuoct2020.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

7.5