OpenSC up to 0.18.x Response Smartcard out-of-bounds

Summaryinfo

A vulnerability, which was classified as critical, has been found in OpenSC up to 0.18.x. Affected is an unknown function of the component Response Handler. The manipulation as part of Smartcard leads to out-of-bounds. This vulnerability is documented as CVE-2018-16427. It is possible to launch the attack on the physical device. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSC up to 0.18.x. It has been rated as problematic. This issue affects an unknown functionality of the component Response Handler. The manipulation as part of a Smartcard leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Various out of bounds reads when handling responses in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to potentially crash the opensc library using programs.

The bug was discovered 08/11/2018. The weakness was released 09/04/2018 (Website). It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2018-16427 since 09/03/2018. The exploitation is known to be easy. Attacking locally is a requirement. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 23 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118880 (openSUSE Security Update : opensc (openSUSE-2018-1384)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171704 (SUSE Enterprise Linux Security Update for opensc (SUSE-SU-2018:3622-1)).

Upgrading to version 0.19.0-rc1 eliminates this vulnerability. A possible mitigation has been published 3 months after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118880). Entries connected to this vulnerability are available at VDB-123526, VDB-123527, VDB-123528 and VDB-123542. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

• OpenSC

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18

License

• open-source

Website

• Product: https://github.com/OpenSC/OpenSC/

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Be aware that VulDB is the high quality source for vulnerability data.

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