CVE-2016-1000340

bouncycastle: Carry propagation bug in math.raw.Nat??? class

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the Bouncy Castle JCE Provider versions 1.51 to 1.55, a carry propagation bug was introduced in the implementation of squaring for several raw math classes have been fixed (org.bouncycastle.math.raw.Nat???). These classes are used by our custom elliptic curve implementations (org.bouncycastle.math.ec.custom.**), so there was the possibility of rare (in general usage) spurious calculations for elliptic curve scalar multiplications. Such errors would have been detected with high probability by the output validation for our scalar multipliers.

En Bouncy Castle JCE Provider, de la versión 1.51 a la 1.55, se solucionó la introducción de un error de propagación de dígito (carry propagation) en la implementación de la elevación al cuadrado para varias clases raw math (org.bouncycastle.math.raw.Nat???). Las implementaciones de curva elíptica personalizadas emplean estas clases (org.bouncycastle.math.ec.custom.**), por lo que existe la posibilidad de que haya cálculos raros falsos para las multiplicaciones escalares de curva elíptica. Tales errores se hubiesen detectado con una alta probabilidad por la validación de salidas de los multiplicadores escalares.

*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

Local

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

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

2018-06-04 CVE Reserved
2018-06-04 CVE Published
2023-07-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-19: Data Processing Errors
CWE-682: Incorrect Calculation

CAPEC

References (7)

URL	Tag	Source
https://security.netapp.com/advisory/ntap-20181127-0004	X_refsource_confirm
https://www.oracle.com/security-alerts/cpuoct2020.html	X_refsource_misc

URL	Date	SRC

URL	Date	SRC
https://github.com/bcgit/bc-java/commit/790642084c4e0cadd47352054f868cc8397e2c00#diff-e5934feac8203ca0104ab291a3560a31	2020-10-20

URL	Date	SRC
https://access.redhat.com/errata/RHSA-2018:2669	2020-10-20
https://access.redhat.com/errata/RHSA-2018:2927	2020-10-20
https://access.redhat.com/security/cve/CVE-2016-1000340	2018-10-16
https://bugzilla.redhat.com/show_bug.cgi?id=1588688	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"				>= 1.51 <= 1.55 Search vendor "Bouncycastle" for product "Legion-of-the-bouncy-castle-java-crytography-api" and version " >= 1.51 <= 1.55"		-		Affected