{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/logback/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":["Logback"],"_cs_severities":["medium"],"_cs_tags":["denial-of-service","logback","java"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eA vulnerability exists in Logback that allows a remote, anonymous attacker to potentially conduct a denial-of-service attack. While the specific versions affected or the technical details of the vulnerability are not provided in the source, the generic nature of Logback's logging functionality implies a wide potential scope. Logback is a widely used logging framework for Java applications. Therefore, successful exploitation could lead to application downtime and resource exhaustion. Defenders should investigate their Logback deployments and apply relevant patches as they become available.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a vulnerable application using Logback. This could involve reconnaissance to determine the logging framework in use.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious request or input designed to trigger excessive logging or resource consumption within the Logback framework.\u003c/li\u003e\n\u003cli\u003eThe attacker sends the crafted request to the vulnerable application. This could be via HTTP, network socket, or any other interface the application exposes.\u003c/li\u003e\n\u003cli\u003eLogback processes the malicious input, potentially leading to excessive memory allocation or CPU usage as it attempts to log the data.\u003c/li\u003e\n\u003cli\u003eThe vulnerable application becomes unresponsive due to the resource exhaustion caused by Logback's excessive logging activity.\u003c/li\u003e\n\u003cli\u003eThe attacker repeats steps 3-5 to maintain the denial-of-service condition, preventing legitimate users from accessing the application.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of this Logback vulnerability results in a denial-of-service condition. The lack of specifics prevents accurate assessment of damage or victim count. Organizations using Logback could experience application downtime, leading to business disruption and potential data loss. The impact is dependent on the criticality of the affected applications.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMonitor web server logs for unusual patterns indicative of denial-of-service attempts, specifically focusing on requests that might trigger excessive logging using the \u003ccode\u003ewebserver\u003c/code\u003e category and \u003ccode\u003elinux\u003c/code\u003e or \u003ccode\u003ewindows\u003c/code\u003e product in your SIEM.\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule detecting high request rates from single IPs to identify potential DoS attempts against web applications using Logback.\u003c/li\u003e\n\u003cli\u003eInvestigate and patch any identified Logback instances as updates become available from the vendor.\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2024-05-03T12:00:00Z","date_published":"2024-05-03T12:00:00Z","id":"https://feed.craftedsignal.io/briefs/2024-05-logback-dos/","summary":"A remote, anonymous attacker can exploit a vulnerability in Logback to perform a denial-of-service (DoS) attack.","title":"Logback Denial of Service Vulnerability","url":"https://feed.craftedsignal.io/briefs/2024-05-logback-dos/"}],"language":"en","title":"CraftedSignal Threat Feed - Logback","version":"https://jsonfeed.org/version/1.1"}