OpenSC up to 0.20.x TCOS Smart Card Software Driver tcos_decipher buffer overflow

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5.3$0-$5k0.00

A vulnerability was found in OpenSC up to 0.20.x. It has been classified as critical. Affected is the function tcos_decipher of the component TCOS Smart Card Software Driver. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-120. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The TCOS smart card software driver in OpenSC before 0.21.0-rc1 has a stack-based buffer overflow in tcos_decipher.

The weakness was shared 10/06/2020. The advisory is available at bugs.chromium.org. This vulnerability is traded as CVE-2020-26572 since 10/06/2020. Access to the local network is required for this attack to succeed. Required for exploitation is a authentication. Technical details are known, but there is no available exploit.

Upgrading to version 0.21.0-rc1 eliminates this vulnerability.

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VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

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VulDB Base Score: 🔒
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VulDB Reliability: 🔍

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Exploitinginfoedit

Class: Memory corruption
CWE: CWE-120
ATT&CK: Unknown

Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenSC 0.21.0-rc1

Timelineinfoedit

10/06/2020 CVE assigned
10/06/2020 +0 days VulDB entry created
10/06/2020 +0 days Advisory disclosed
11/16/2020 +41 days VulDB last update

Sourcesinfoedit

Advisory: bugs.chromium.org
Status: Confirmed

CVE: CVE-2020-26572 (🔒)

Entryinfoedit

Created: 10/06/2020 10:31 AM
Updated: 11/16/2020 05:35 PM
Changes: (14) vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai
Complete: 🔍

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