Multiple vulnerabilities in OpenSC

1) Out-of-bounds read

EUVDB-ID: #VU82975

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-2023-4535

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows an attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition within the MyEID driver when handling symmetric key encryption. An attacker with physical access to the system can use a specially crafted USB device to trigger an out-of-bounds read error and gain access to potentially sensitive information.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenSC: 0.2.0 - 0.23.0 rc2

External links

http://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1
http://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories
http://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651
http://bugzilla.redhat.com/show_bug.cgi?id=2240914
http://access.redhat.com/security/cve/CVE-2023-4535
http://github.com/OpenSC/OpenSC/commit/f1993dc4e0b33050b8f72a3558ee88b24c4063b2

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.

2) Buffer overflow

EUVDB-ID: #VU82974

Risk: Low

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

CVE-ID: CVE-2023-40661

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error in the card enrollment process using pkcs15-init when a user or administrator enrolls cards. An attacker with physical access to the system can trigger memory corruption and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenSC: 0.2.0 - 0.23.0 rc2

External links

http://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1
http://bugzilla.redhat.com/show_bug.cgi?id=2240913
http://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories
http://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651
http://access.redhat.com/security/cve/CVE-2023-40661

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.

3) Improper Authorization

EUVDB-ID: #VU82973

Risk: Low

CVSSv3.1: 6.6 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-40660

CWE-ID: CWE-285 - Improper Authorization

Exploit availability: No

Description

The vulnerability allows an attacker to bypass authorization process.

The vulnerability exists due to a logic error in the authorization process. When a token/card is authenticated by one process, it can perform cryptographic operations in other processes when an empty zero-length pin is passed. An attacker with physical proximity to the system can bypass the OS logon/screen for small permanently connected tokens to computers.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

OpenSC: 0.2.0 - 0.23.0 rc2

External links

http://github.com/OpenSC/OpenSC/releases/tag/0.24.0-rc1
http://github.com/OpenSC/OpenSC/wiki/OpenSC-security-advisories
http://bugzilla.redhat.com/show_bug.cgi?id=2240912
http://github.com/OpenSC/OpenSC/issues/2792#issuecomment-1674806651
http://access.redhat.com/security/cve/CVE-2023-40660

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.