{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/vendors/ossp/feed.json","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cpes":[],"_cs_cves":[],"_cs_exploited":false,"_cs_has_poc":false,"_cs_poc_references":[],"_cs_products":["iSelect"],"_cs_severities":["high"],"_cs_tags":["cve-2016-20048","buffer-overflow","local-privilege-escalation"],"_cs_type":"advisory","_cs_vendors":["OSSP"],"content_html":"\u003cp\u003eiSelect 1.4.0-2+b1 is vulnerable to a local buffer overflow. This vulnerability allows a local attacker to execute arbitrary code with the privileges of the user running the application. The vulnerability occurs when the application processes an overly long value provided to the \u003ccode\u003e-k\u003c/code\u003e or \u003ccode\u003e--key\u003c/code\u003e parameter. By crafting a malicious argument, an attacker can overwrite the stack buffer, inject shellcode, and gain control of program execution. Successful exploitation can lead to arbitrary code execution and potentially full system compromise within the user's security context. This vulnerability was reported in 2016, but can still exist in unpatched or older systems where iSelect is deployed.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains local access to a system with iSelect 1.4.0-2+b1 installed.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious command-line argument for iSelect, specifically targeting the \u003ccode\u003e-k\u003c/code\u003e or \u003ccode\u003e--key\u003c/code\u003e parameter.\u003c/li\u003e\n\u003cli\u003eThe crafted argument includes a NOP sled, followed by shellcode, and a return address that points back to the NOP sled or shellcode. The total length of the argument exceeds 1024 bytes.\u003c/li\u003e\n\u003cli\u003eThe attacker executes iSelect with the malicious argument. The overly long input is copied into a 1024-byte stack buffer without proper bounds checking.\u003c/li\u003e\n\u003cli\u003eThe buffer overflow overwrites adjacent memory on the stack, including the return address.\u003c/li\u003e\n\u003cli\u003eiSelect attempts to return from the vulnerable function, but instead jumps to the attacker-controlled address (NOP sled or shellcode).\u003c/li\u003e\n\u003cli\u003eThe shellcode executes with the privileges of the user running iSelect. This could involve creating new processes, modifying files, or establishing a reverse shell.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this vulnerability results in arbitrary code execution with the privileges of the user running iSelect. This could allow an attacker to escalate privileges, install malware, steal sensitive data, or disrupt system operations. Due to the local nature of the attack, an attacker must first gain access to the target system. The severity is high because it allows complete compromise of the application and potentially the user's account.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade iSelect to a patched version that addresses the buffer overflow vulnerability, if a patch is available.\u003c/li\u003e\n\u003cli\u003eMonitor process execution for iSelect being launched with unusually long command-line arguments using the Sigma rule \u003ccode\u003eDetect iSelect Buffer Overflow Attempt\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eImplement access controls to limit who can execute iSelect on vulnerable systems.\u003c/li\u003e\n\u003cli\u003eConsider deploying application whitelisting to prevent the execution of unauthorized code within the iSelect process.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-02T12:00:00Z","date_published":"2024-01-02T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-iselect-buffer-overflow/","summary":"iSelect 1.4.0-2+b1 contains a local buffer overflow vulnerability, allowing local attackers to execute arbitrary code by supplying an oversized value to the -k/--key parameter and overflowing a 1024-byte stack buffer.","title":"iSelect 1.4.0-2+b1 Local Buffer Overflow Vulnerability","url":"https://feed.craftedsignal.io/briefs/2024-01-iselect-buffer-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed - OSSP","version":"https://jsonfeed.org/version/1.1"}