CVE-2019-13629

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

MatrixSSL 4.2.1 and earlier contains a timing side channel in ECDSA signature generation. This allows a local or a remote attacker, able to measure the duration of hundreds to thousands of signing operations, to compute the private key used. The issue occurs because crypto/pubkey/ecc_math.c scalar multiplication leaks the bit length of the scalar.

MatrixSSL versión 4.2.1 y anteriores, contienen un canal lateral de temporización en la generación de firmas ECDSA. Esto permite a un atacante local o remoto, capaz de medir la duración de cientos de miles de operaciones de firma, calcular la clave privada usada. El problema se presenta porque la multiplicación escalar del archivo crypto/pubkey/ecc_math.c pierde la longitud de bits del scalar.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-07-17 CVE Reserved
2019-10-03 CVE Published
2024-08-04 CVE Updated
2024-09-26 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-203: Observable Discrepancy
CWE-327: Use of a Broken or Risky Cryptographic Algorithm

CAPEC

References (4)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2019/10/02/2	Mailing List
https://eprint.iacr.org/2011/232.pdf	Not Applicable
https://minerva.crocs.fi.muni.cz	Product
https://tches.iacr.org/index.php/TCHES/article/view/7337	Not Applicable

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Matrixssl Search vendor "Matrixssl"		Matrixssl Search vendor "Matrixssl" for product "Matrixssl"				<= 4.2.1 Search vendor "Matrixssl" for product "Matrixssl" and version " <= 4.2.1"		-		Affected