Vulnerability CVE-2019-19481

Vulnerability Name:

CVE-2019-19481 (CCN-172411)

Assigned:

2019-10-30

Published:

2019-10-30

Updated:

2020-01-24

Summary:

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.

CVSS v3 Severity:

4.6 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
4.0 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Physical Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

4.6 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
4.0 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Physical Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): High

CVSS v2 Severity:

2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Partial

10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-119

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2019-19481

Source: MLIST
Type: Mailing List
[oss-security] 20191229 OpenSC 0.20.0 released

Source: MISC
Type: Permissions Required, Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18618

Source: XF
Type: UNKNOWN
opensc-cve201919481-bo(172411)

Source: CCN
Type: OpenSC GIT Repository
cac1: Correctly handle the buffer limits

Source: MISC
Type: Patch
https://github.com/OpenSC/OpenSC/commit/b75c002cfb1fd61cd20ec938ff4937d7b1a94278

Source: FEDORA
Type: UNKNOWN
FEDORA-2020-3c93790abe

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-19481

Vulnerable Configuration:

Configuration 1:

cpe:/a:opensc_project:opensc:0.19.0:-:*:*:*:*:*:*

OR cpe:/a:opensc_project:opensc:0.20.0:rc1:*:*:*:*:*:*

OR cpe:/a:opensc_project:opensc:0.20.0:rc2:*:*:*:*:*:*

OR cpe:/a:opensc_project:opensc:0.20.0:rc3:*:*:*:*:*:*

Configuration RedHat 1:

cpe:/o:redhat:enterprise_linux:8:*:*:*:*:*:*:*

Configuration RedHat 2:

cpe:/o:redhat:enterprise_linux:8::baseos:*:*:*:*:*

Configuration CCN 1:

cpe:/a:opensc_project:opensc:0.19.0:-:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.redhat.rhsa:def:20204483	P	RHSA-2020:4483: opensc security, bug fix, and enhancement update (Moderate)	2020-11-04
oval:com.ubuntu.disco:def:2019194810000000	V	CVE-2019-19481 on Ubuntu 19.04 (disco) - low.	2019-12-02
oval:com.ubuntu.bionic:def:2019194810000000	V	CVE-2019-19481 on Ubuntu 18.04 LTS (bionic) - low.	2019-12-02
oval:com.ubuntu.xenial:def:2019194810000000	V	CVE-2019-19481 on Ubuntu 16.04 LTS (xenial) - low.	2019-12-02

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