{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/parseusbs/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[{"cvss":7.8,"id":"CVE-2026-40029"}],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["command injection","lnk","parseusbs","cve-2026-40029"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eparseusbs before version 1.9 is susceptible to an OS command injection vulnerability (CVE-2026-40029) within the \u003ccode\u003eparseUSBs.py\u003c/code\u003e script. This flaw arises from the program\u0026rsquo;s failure to sanitize LNK file paths before passing them to the \u003ccode\u003eos.popen()\u003c/code\u003e function. This allows an attacker to craft malicious .lnk filenames containing shell metacharacters. When \u003ccode\u003eparseusbs\u003c/code\u003e processes a USB drive containing such a file, the specially crafted filename is interpreted as a command, leading to arbitrary command execution on the system of the forensic examiner using the tool. The vulnerable versions of parseusbs are used by security professionals for USB forensic analysis, making successful exploitation dangerous for those running the tool.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker crafts a malicious .lnk file. The filename includes shell metacharacters designed to execute arbitrary commands. For example, a filename could be \u003ccode\u003etest.lnk; rm -rf /tmp\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eThe attacker places the crafted .lnk file onto a USB drive.\u003c/li\u003e\n\u003cli\u003eA forensic examiner uses parseusbs (version before 1.9) to analyze the USB drive.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eparseUSBs.py\u003c/code\u003e script processes the files on the USB drive, including the malicious .lnk file.\u003c/li\u003e\n\u003cli\u003eThe script extracts the .lnk file path without proper sanitization.\u003c/li\u003e\n\u003cli\u003eThe unsanitized .lnk file path is passed to the \u003ccode\u003eos.popen()\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eos.popen()\u003c/code\u003e function interprets the shell metacharacters in the filename, executing the attacker\u0026rsquo;s injected command.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves arbitrary code execution on the examiner\u0026rsquo;s system, allowing them to potentially compromise the system, steal sensitive data, or further pivot into the network.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability allows an attacker to execute arbitrary commands on the system of a forensic examiner using \u003ccode\u003eparseusbs\u003c/code\u003e. This could lead to complete system compromise, data exfiltration, or further malicious activities. Given that \u003ccode\u003eparseusbs\u003c/code\u003e is a tool used by security professionals, a successful attack could have significant consequences, potentially exposing sensitive forensic data. The impact is particularly severe as the examiner likely has access to sensitive information related to their investigations.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade \u003ccode\u003eparseusbs\u003c/code\u003e to version 1.9 or later to remediate CVE-2026-40029.\u003c/li\u003e\n\u003cli\u003eMonitor process creation events for unexpected processes spawned by Python (\u003ccode\u003epython.exe\u003c/code\u003e or \u003ccode\u003epython3\u003c/code\u003e). Use the Sigma rule \u0026ldquo;Detect Suspicious Process Creation by Python\u0026rdquo; to detect potential exploitation attempts.\u003c/li\u003e\n\u003cli\u003eImplement file integrity monitoring for LNK files, particularly those found on USB drives. The Sigma rule \u0026ldquo;Detect Creation of LNK Files in Removable Media\u0026rdquo; can help identify suspicious LNK file creation.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-08T22:16:23Z","date_published":"2026-04-08T22:16:23Z","id":"/briefs/2026-04-parseusbs-cmd-injection/","summary":"parseusbs before 1.9 is vulnerable to OS command injection in parseUSBs.py due to unsanitized LNK file paths passed to os.popen(), allowing arbitrary command execution via crafted .lnk filenames.","title":"parseusbs Unsanitized LNK File Command Injection Vulnerability","url":"https://feed.craftedsignal.io/briefs/2026-04-parseusbs-cmd-injection/"}],"language":"en","title":"CraftedSignal Threat Feed — Parseusbs","version":"https://jsonfeed.org/version/1.1"}