{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/stack-buffer-overflow/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":3.8,"id":"CVE-2025-66215"}],"_cs_exploited":false,"_cs_products":["OpenSC"],"_cs_severities":["critical"],"_cs_tags":["opensc","stack-buffer-overflow","cve-2025-66215","smart-card"],"_cs_type":"advisory","_cs_vendors":["OpenSC"],"content_html":"\u003cp\u003eCVE-2025-66215 describes a stack buffer overflow vulnerability in the \u003ccode\u003ecard-oberthur\u003c/code\u003e component of the OpenSC project. While the provided source material lacks extensive details, the nature of a stack buffer overflow in a card processing library suggests a high-risk scenario. Attackers could potentially exploit this flaw to inject and execute arbitrary code by crafting malicious smart card data. The lack of detailed information makes it difficult to assess the scope of the vulnerability precisely, but the severity is elevated due to the potential for remote code execution and the sensitive nature of smart card operations. Defenders should prioritize patching OpenSC installations where applicable, and monitor for suspicious activity involving smart card interactions until patching is possible.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003cp\u003eDue to the limited information available, the following attack chain is inferred based on the nature of stack buffer overflow vulnerabilities and smart card interactions:\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker identifies a vulnerable OpenSC installation (version unspecified).\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious smart card or smart card data designed to trigger the overflow in the \u003ccode\u003ecard-oberthur\u003c/code\u003e component.\u003c/li\u003e\n\u003cli\u003eA user or process interacts with the smart card using the vulnerable OpenSC library. This could occur through a smart card reader connected to a computer, or via a software process utilizing OpenSC for cryptographic operations.\u003c/li\u003e\n\u003cli\u003eThe crafted data is processed by the \u003ccode\u003ecard-oberthur\u003c/code\u003e component within OpenSC.\u003c/li\u003e\n\u003cli\u003eThe oversized data overwrites the stack buffer, potentially corrupting adjacent memory regions.\u003c/li\u003e\n\u003cli\u003eThe attacker leverages the overflow to overwrite the return address on the stack with an address pointing to attacker-controlled code.\u003c/li\u003e\n\u003cli\u003eWhen the function returns, control is transferred to the attacker\u0026rsquo;s injected code.\u003c/li\u003e\n\u003cli\u003eThe attacker\u0026rsquo;s code executes with the privileges of the OpenSC process, enabling activities such as data exfiltration, system compromise, or lateral movement.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2025-66215 allows an attacker to execute arbitrary code on the targeted system. This can lead to complete system compromise, data theft, or denial of service. Given that OpenSC is often used in security-sensitive contexts involving authentication and access control, the potential impact is significant. The number of affected systems is currently unknown, but any system using a vulnerable version of OpenSC with Oberthur cards is at risk.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade OpenSC to a patched version as soon as a fix for CVE-2025-66215 is available. Monitor the OpenSC project and security advisories for updates.\u003c/li\u003e\n\u003cli\u003eImplement runtime memory protection mechanisms (e.g., Address Space Layout Randomization (ASLR), Data Execution Prevention (DEP)) to mitigate the impact of successful exploitation. While these won\u0026rsquo;t prevent the overflow, they can make exploitation more difficult.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u0026ldquo;Detect Suspicious OpenSC Process Execution\u0026rdquo; to identify potentially malicious processes utilizing OpenSC binaries.\u003c/li\u003e\n\u003cli\u003eMonitor systems for unexpected process executions originating from OpenSC-related processes, using process creation logs.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-07-03T12:00:00Z","date_published":"2024-07-03T12:00:00Z","id":"/briefs/2024-07-opensc-stack-overflow/","summary":"CVE-2025-66215 is a critical stack buffer overflow vulnerability within the OpenSC project, specifically affecting the `card-oberthur` component, potentially leading to arbitrary code execution.","title":"OpenSC Stack Buffer Overflow Vulnerability (CVE-2025-66215)","url":"https://feed.craftedsignal.io/briefs/2024-07-opensc-stack-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed — Stack-Buffer-Overflow","version":"https://jsonfeed.org/version/1.1"}