Vulnerability identifier: #VU23848

Vulnerability risk: Low

CVSSv3.1: 2.1 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-19479

CWE-ID: CWE-125

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 user to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition when parsing SETCOS file attribute in libopensc/card-setcos.c. A local user can pass specially crafted file to the application, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OpenSC: 0.4.0 - 0.20.0 rc34

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External links
http://www.openwall.com/lists/oss-security/2019/12/29/1
http://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18693
http://bugzilla.redhat.com/show_bug.cgi?id=1782521
http://github.com/OpenSC/OpenSC/commit/c3f23b836e5a1766c36617fe1da30d22f7b63de2
http://lists.debian.org/debian-lts-announce/2019/12/msg00031.html
http://github.com/OpenSC/OpenSC/releases/tag/0.20.0

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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.