CVE-2016-1000338

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

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

En Bouncy Castle JCE Provider en versiones 1.55 y anteriores, el DSA no valida completamente el cifrado ASN.1 de la firma en verificación. Es posible inyectar elementos extra en la secuencia que forma la firma y, aún así, validarla. En algunos casos, esto podría permitir la introducción de datos "invisibles" en una estructura firmada.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-06-01 CVE Reserved
2018-06-01 CVE Published
2024-08-06 CVE Updated
2024-08-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-325: Missing Cryptographic Step
CWE-347: Improper Verification of Cryptographic Signature

CAPEC

References (10)

URL	Tag	Source
https://lists.apache.org/thread.html/708d94141126eac03011144a971a6411fcac16d9c248d1d535a39451%40%3Csolr-user.lucene.apache.org%3E	Mailing List
https://lists.debian.org/debian-lts-announce/2018/07/msg00009.html	Mailing List
https://security.netapp.com/advisory/ntap-20231006-0011
https://www.oracle.com/security-alerts/cpuoct2020.html

URL	Date	SRC

URL	Date	SRC
https://github.com/bcgit/bc-java/commit/b0c3ce99d43d73a096268831d0d120ffc89eac7f#diff-3679f5a9d2b939d0d3ee1601a7774fb0	2023-11-07

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:2669	2023-11-07
https://access.redhat.com/errata/RHSA-2018:2927	2023-11-07
https://usn.ubuntu.com/3727-1	2023-11-07
https://access.redhat.com/security/cve/CVE-2016-1000338	2018-10-16
https://bugzilla.redhat.com/show_bug.cgi?id=1588313	2018-10-16

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Bouncycastle Search vendor "Bouncycastle"		Legion-of-the-bouncy-castle-java-crytography-api Search vendor "Bouncycastle" for product "Legion-of-the-bouncy-castle-java-crytography-api"				<= 1.55 Search vendor "Bouncycastle" for product "Legion-of-the-bouncy-castle-java-crytography-api" and version " <= 1.55"		-		Affected