CVE-2024-45617: Libopensc: uninitialized values after incorrect or missing checking return values of functions in libopensc
A vulnerability was found in OpenSC, OpenSC tools, PKCS#11 module, minidriver, and CTK. An attacker could use a crafted USB Device or Smart Card, which would present the system with a specially crafted response to APDUs.
Insufficient or missing checking of return values of functions leads to unexpected work with variables that have not been initialized.
Security readout for executives and security teams
Plain-English summary
This is a low-severity OpenSC flaw where a malicious smart card or USB device could trigger unreliable handling of uninitialized data. Business impact is limited by the need for physical device/card interaction and high attack complexity, but environments using smart-card authentication should still track vendor fixes.
Executive priority
Handle through normal vulnerability management unless smart-card authentication is critical or widely deployed. Prioritize exposed authentication workstations and shared systems where untrusted physical devices could be introduced.
Technical view
OpenSC components, including tools, PKCS#11 module, minidriver, CTK, and libopensc, may fail to check function return values before using variables. Crafted APDU responses from a USB device or smart card could affect confidentiality, integrity, and availability at low impact levels.
Likely exposure
Most relevant exposure is on systems that use OpenSC with smart cards, USB tokens, or PKCS#11 workflows. The bundle lists Red Hat Enterprise Linux 7, 8, 9, and 10 opensc packages as affected.
Exploitation context
The CVSS vector is physical, high complexity, no privileges, and no user interaction. The source bundle does not identify active exploitation, and the CVE is not listed as KEV.
Researcher notes
Evidence supports a CWE-457 uninitialized-variable issue caused by insufficient return-value checking after APDU responses. The provided data does not include exploit details, a universal fixed version, or confirmed exploitation.
Mitigation direction
Check Red Hat, Debian, and OpenSC guidance for fixed opensc packages.
Apply vendor-provided OpenSC or opensc updates when available.
Restrict use of untrusted smart cards and USB authentication devices.
Prioritize systems where smart-card authentication is enabled.
Document any compensating controls for physical device access.
Validation and detection
Inventory systems with OpenSC, libopensc, PKCS#11, minidriver, or CTK installed.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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cwe · low confidence lookup
CWE-457: Exact CWE lookup
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CWE-457 · source CWE mapping
Use of Uninitialized Variable
Use of Uninitialized Variable represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.