Vulnerability identifier: #VU20000

Vulnerability risk: Low

CVSSv3.1: 5.8 [CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-16421

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
OpenSC
Universal components / Libraries / Libraries used by multiple products

Vendor: OpenSC

Description

The vulnerability allows a local attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when handling responses from a CAC Card in cac_get_serial_nr_from_CUID in libopensc/card-cac.c. A local attacker can create a specially crafted smartcards, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSC: 0.4.0 - 0.19.0

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External links
http://access.redhat.com/errata/RHSA-2019:2154
http://github.com/OpenSC/OpenSC/commit/360e95d45ac4123255a4c796db96337f332160ad#diff-848b13147a344ba2c6361d91ca77feb1
http://github.com/OpenSC/OpenSC/releases/tag/0.19.0-rc1
http://www.x41-dsec.de/lab/advisories/x41-2018-002-OpenSC/

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.