{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata — refreshed continuously.","feed_url":"https://feed.craftedsignal.io/tags/file_manipulation/","home_page_url":"https://feed.craftedsignal.io/","items":[{"_cs_actors":[],"_cs_cves":[],"_cs_exploited":false,"_cs_products":[],"_cs_severities":["high"],"_cs_tags":["libssh","vulnerability","dos","file_manipulation"],"_cs_type":"advisory","_cs_vendors":[],"content_html":"\u003cp\u003eThe libssh library, a widely used implementation of the SSH protocol, contains several vulnerabilities that could be exploited by a malicious actor. These vulnerabilities could allow an attacker to manipulate files on a system utilizing the vulnerable library, or cause a denial-of-service (DoS) condition, rendering the system or service unavailable. Given the widespread use of libssh in various applications and systems, these vulnerabilities pose a significant risk to organizations relying on this library for secure communication. The impact ranges from unauthorized data modification to complete service outages, impacting availability and data integrity. Publicly available exploit code may exist, increasing the likelihood of exploitation.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eThe attacker identifies a system using a vulnerable version of libssh.\u003c/li\u003e\n\u003cli\u003eThe attacker establishes an SSH connection to the target system.\u003c/li\u003e\n\u003cli\u003eThe attacker exploits a vulnerability in libssh related to file handling (specific CVE details unavailable from provided source), potentially through crafted SSH commands.\u003c/li\u003e\n\u003cli\u003eSuccessful exploitation allows the attacker to modify arbitrary files on the system, potentially including configuration files or application data.\u003c/li\u003e\n\u003cli\u003eAlternatively, the attacker exploits a vulnerability related to resource management within libssh to trigger a denial-of-service.\u003c/li\u003e\n\u003cli\u003eThis DoS is achieved by sending a specific sequence of SSH requests that consume excessive resources, such as memory or CPU time.\u003c/li\u003e\n\u003cli\u003eThe targeted service becomes unresponsive, preventing legitimate users from accessing it.\u003c/li\u003e\n\u003cli\u003eThe attacker maintains the DoS condition, disrupting the target\u0026rsquo;s operations.\u003c/li\u003e\n\u003c/ol\u003e\n\u003ch2 id=\"impact\"\u003eImpact\u003c/h2\u003e\n\u003cp\u003eSuccessful exploitation of these libssh vulnerabilities can have severe consequences. File manipulation could lead to data corruption, unauthorized access, or system compromise. A denial-of-service attack could disrupt critical services, leading to financial losses, reputational damage, and operational downtime. The number of potential victims is vast, considering the widespread use of libssh in servers, network devices, and embedded systems. The targeted systems and sectors are not specified in the source material.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eImplement network monitoring to detect unusual SSH traffic patterns that may indicate exploitation attempts (review existing firewall and network connection logs).\u003c/li\u003e\n\u003cli\u003eDeploy the Sigma rule \u003ccode\u003eDetectSuspiciousSSHClientVersion\u003c/code\u003e to identify potentially malicious SSH clients connecting to your systems.\u003c/li\u003e\n\u003cli\u003eMonitor systems for unexpected file modifications, focusing on configuration files and application data (enable file integrity monitoring).\u003c/li\u003e\n\u003c/ul\u003e\n","date_modified":"2026-04-16T10:29:59Z","date_published":"2026-04-16T10:29:59Z","id":"/briefs/2026-04-libssh-vulns/","summary":"Multiple vulnerabilities in libssh allow an attacker to manipulate files or cause a denial-of-service condition, potentially leading to data corruption or service disruption.","title":"Multiple Vulnerabilities in libssh Allow File Manipulation and DoS","url":"https://feed.craftedsignal.io/briefs/2026-04-libssh-vulns/"}],"language":"en","title":"CraftedSignal Threat Feed — File_manipulation","version":"https://jsonfeed.org/version/1.1"}