{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/vendors/yasr/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":["Yasr"],"_cs_severities":["high"],"_cs_tags":["buffer-overflow","local-privilege-escalation","cve-2016-20041"],"_cs_type":"advisory","_cs_vendors":["Yasr"],"content_html":"\u003cp\u003eYasr version 0.6.9-5 is susceptible to a buffer overflow vulnerability identified as CVE-2016-20041. This vulnerability allows a local attacker to potentially crash the application or achieve arbitrary code execution. The attack vector involves supplying a maliciously crafted, oversized argument to the \u003ccode\u003e-p\u003c/code\u003e parameter when invoking the \u003ccode\u003eyasr\u003c/code\u003e binary. This could lead to a compromise of the system if successfully exploited. Defenders should focus on monitoring command-line arguments and patching vulnerable systems.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAttacker gains local access to the system.\u003c/li\u003e\n\u003cli\u003eAttacker crafts a malicious payload containing junk data, shellcode, and a return address.\u003c/li\u003e\n\u003cli\u003eAttacker invokes the \u003ccode\u003eyasr\u003c/code\u003e binary with the \u003ccode\u003e-p\u003c/code\u003e parameter, supplying the crafted payload as its argument.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eyasr\u003c/code\u003e application attempts to process the oversized argument without proper bounds checking.\u003c/li\u003e\n\u003cli\u003eThe crafted payload overwrites the stack, including critical data such as return addresses.\u003c/li\u003e\n\u003cli\u003eThe application attempts to return from a function, but instead jumps to the attacker-controlled shellcode.\u003c/li\u003e\n\u003cli\u003eThe attacker's shellcode executes with the privileges of the \u003ccode\u003eyasr\u003c/code\u003e process.\u003c/li\u003e\n\u003cli\u003eAttacker achieves arbitrary code execution, potentially compromising the system.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of CVE-2016-20041 can lead to a denial-of-service condition (application crash) or, more severely, arbitrary code execution with the privileges of the \u003ccode\u003eyasr\u003c/code\u003e process. The number of potential victims depends on the prevalence of \u003ccode\u003eyasr\u003c/code\u003e version 0.6.9-5 in local environments. If exploited, attackers could gain unauthorized access to sensitive data or further compromise the affected system.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor process creation events for invocations of \u003ccode\u003eyasr\u003c/code\u003e with unusually long arguments to the \u003ccode\u003e-p\u003c/code\u003e parameter, using the process_creation Sigma rule provided.\u003c/li\u003e\n\u003cli\u003eConsider implementing application control or whitelisting to restrict the execution of \u003ccode\u003eyasr\u003c/code\u003e to authorized users and use cases.\u003c/li\u003e\n\u003cli\u003eAlthough patching is not possible due to the age of this software, consider removing this software from production to mitigate against exploitation of CVE-2016-20041.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-01-30T12:00:00Z","date_published":"2024-01-30T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-01-yasr-buffer-overflow/","summary":"Yasr version 0.6.9-5 is vulnerable to a buffer overflow, allowing local attackers to potentially crash the application or execute arbitrary code by providing an overly large argument to the '-p' parameter.","title":"Yasr 0.6.9-5 Buffer Overflow Vulnerability (CVE-2016-20041)","url":"https://feed.craftedsignal.io/briefs/2024-01-yasr-buffer-overflow/"}],"language":"en","title":"CraftedSignal Threat Feed - Yasr","version":"https://jsonfeed.org/version/1.1"}