CVE-2019-19481

opensc: Improper handling of buffer limits for CAC certificates

Severity Score

4.6

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An issue was discovered in OpenSC through 0.19.0 and 0.20.x through 0.20.0-rc3. libopensc/card-cac1.c mishandles buffer limits for CAC certificates.

Se detectó un problema en OpenSC versiones hasta 0.19.0 y versiones 0.20.x hasta 0.20.0-rc3. El archivo libopensc/card-cac1.c maneja inapropiadamente los límites del búfer para los certificados CAC.

The OpenSC set of libraries and utilities provides support for working with smart cards. OpenSC focuses on cards that support cryptographic operations and enables their use for authentication, mail encryption, or digital signatures. Issues addressed include double free and out of bounds access vulnerabilities.

*Credits: N/A

Attack Vector

Physical

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-12-01 CVE Reserved
2019-12-01 CVE Published
2024-08-05 CVE Updated
2025-04-13 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (5)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2019/12/29/1	Mailing List

URL	Date	SRC

URL	Date	SRC
https://github.com/OpenSC/OpenSC/commit/b75c002cfb1fd61cd20ec938ff4937d7b1a94278	2023-11-07

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NDSQLMZZYBHO5X3BK7D6E7E6NZIMZDI5	2023-11-07
https://access.redhat.com/security/cve/CVE-2019-19481	2020-11-04
https://bugzilla.redhat.com/show_bug.cgi?id=1782955	2020-11-04

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Opensc Project Search vendor "Opensc Project"		Opensc Search vendor "Opensc Project" for product "Opensc"				0.19.0 Search vendor "Opensc Project" for product "Opensc" and version "0.19.0"		-		Affected
Opensc Project Search vendor "Opensc Project"		Opensc Search vendor "Opensc Project" for product "Opensc"				0.20.0 Search vendor "Opensc Project" for product "Opensc" and version "0.20.0"		rc1		Affected
Opensc Project Search vendor "Opensc Project"		Opensc Search vendor "Opensc Project" for product "Opensc"				0.20.0 Search vendor "Opensc Project" for product "Opensc" and version "0.20.0"		rc2		Affected
Opensc Project Search vendor "Opensc Project"		Opensc Search vendor "Opensc Project" for product "Opensc"				0.20.0 Search vendor "Opensc Project" for product "Opensc" and version "0.20.0"		rc3		Affected