VDB-123548 · CVE-2018-16424 · Qualys 277562

OpenSC up to 0.18.x eGK Card Tool tools/egk-tool.c Response double free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00

A vulnerability was found in OpenSC up to 0.18.x and classified as problematic. Affected by this issue is an unknown code block of the file tools/egk-tool.c of the component eGK Card Tool. The manipulation as part of a Response leads to a double free vulnerability. Using CWE to declare the problem leads to CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A double free when handling responses in read_file in tools/egk-tool.c (aka the eGK card tool) 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 presented 09/04/2018 (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2018-16424 since 09/03/2018. The exploitation is known to be easy. The attack needs to be approached locally. No form of authentication is required for exploitation. There are known technical details, 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). See 123545 and 123549 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 4.1
VulDB Temp Score: 3.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.6
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Double free
CWE: CWE-415 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: OpenSC 0.19.0-rc1
Patch: github.com

Timelineinfo

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 🔍

Sourcesinfo

Advisory: 360e95d45ac4123255a4c796db96337f332160ad
Status: Confirmed

CVE: CVE-2018-16424 (🔍)
See also: 🔍

Entryinfo

Created: 09/04/2018 15:44
Updated: 05/06/2023 19:03
Changes: 09/04/2018 15:44 (75), 03/20/2020 11:53 (2), 05/06/2023 18:56 (5), 05/06/2023 19:03 (1)
Complete: 🔍

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