VDB-123549 · CVE-2018-16425 · Qualys 277562

OpenSC up to 0.18.x HSM Card pkcs15-sc-hsm.c sc_pkcs15emu_sc_hsm_init double free

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability was found in OpenSC up to 0.18.x. It has been classified as problematic. This affects the function sc_pkcs15emu_sc_hsm_init of the file libopensc/pkcs15-sc-hsm.c of the component HSM Card Handler. The manipulation with an unknown input leads to a double free vulnerability. CWE is classifying the issue as CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. This is going to have an impact on availability. The summary by CVE is:

A double free when handling responses from an HSM Card in sc_pkcs15emu_sc_hsm_init in libopensc/pkcs15-sc-hsm.c in OpenSC before 0.19.0-rc1 could be used by attackers able to supply crafted smartcards to cause a denial of service (application crash) or possibly have unspecified other impact.

The bug was discovered 08/14/2018. The weakness was shared 09/04/2018 (Website). The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2018-16425 since 09/03/2018. The exploitability is told to be easy. An attack has to be approached locally. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 20 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118881 (openSUSE Security Update : opensc (openSUSE-2018-1385)), 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 277562 (Fedora Security Update for opensc (FEDORA-2018-d0dff2abaa)).

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 (118881).





CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍


VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.3

VulDB Base Score: 2.1
VulDB Temp Score: 2.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.6
NVD Vector: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Double free
CWE: CWE-415 / CWE-119

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 118881
Nessus Name: openSUSE Security Update : opensc (openSUSE-2018-1385)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: OpenSC 0.19.0-rc1
Patch: github.com


08/14/2018 🔍
09/03/2018 +19 days 🔍
09/03/2018 +0 days 🔍
09/04/2018 +1 days 🔍
09/04/2018 +0 days 🔍
11/09/2018 +66 days 🔍
11/10/2018 +1 days 🔍
05/06/2023 +1638 days 🔍


Advisory: 360e95d45ac4123255a4c796db96337f332160ad
Status: Confirmed

CVE: CVE-2018-16425 (🔍)


Created: 09/04/2018 03:45 PM
Updated: 05/06/2023 07:18 PM
Changes: 09/04/2018 03:45 PM (74), 03/20/2020 11:59 AM (2), 05/06/2023 07:11 PM (5), 05/06/2023 07:18 PM (1)
Complete: 🔍
Cache ID: 44:687:40


No comments yet. Languages: en.

Please log in to comment.

Do you need the next level of professionalism?

Upgrade your account now!