{"description":"Trending threats, MITRE ATT\u0026CK coverage, and detection metadata. Fed continuously.","feed_url":"https://feed.craftedsignal.io/products/modoboa/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":["Modoboa"],"_cs_severities":["high"],"_cs_tags":["command-injection","modoboa","code-execution"],"_cs_type":"advisory","_cs_vendors":["Modoboa"],"content_html":"\u003cp\u003eModoboa, a mail server management platform, is vulnerable to OS command injection in versions 2.7.0 and earlier. The vulnerability stems from the \u003ccode\u003eexec_cmd()\u003c/code\u003e function within \u003ccode\u003emodoboa/lib/sysutils.py\u003c/code\u003e, which executes subprocess calls with \u003ccode\u003eshell=True\u003c/code\u003e without properly sanitizing input. A Reseller or SuperAdmin account, possessing elevated privileges within Modoboa, can inject shell metacharacters into a domain name during domain creation. This injected code is then executed by the system, potentially granting the attacker root access to the underlying server. The vulnerability was confirmed on commit b521bcb4f. Successful exploitation allows for complete control over the mail server, leading to data breaches, service disruption, and further malicious activities.\u003c/p\u003e\n\u003ch2 id=\"attack-chain\"\u003eAttack Chain\u003c/h2\u003e\n\u003col\u003e\n\u003cli\u003eAn attacker obtains or compromises a Modoboa Reseller or SuperAdmin account.\u003c/li\u003e\n\u003cli\u003eThe attacker logs into the Modoboa web interface.\u003c/li\u003e\n\u003cli\u003eThe attacker navigates to the domain creation section.\u003c/li\u003e\n\u003cli\u003eThe attacker crafts a malicious domain name containing shell metacharacters (e.g., \u003ccode\u003e$(id\u0026gt;/tmp/proof).example.com\u003c/code\u003e).\u003c/li\u003e\n\u003cli\u003eThe attacker submits the domain creation request, triggering the \u003ccode\u003eexec_cmd()\u003c/code\u003e function.\u003c/li\u003e\n\u003cli\u003eThe \u003ccode\u003eexec_cmd()\u003c/code\u003e function executes the \u003ccode\u003eopenssl\u003c/code\u003e command with the malicious domain name embedded, leading to command injection.\u003c/li\u003e\n\u003cli\u003eThe injected command executes on the server, allowing the attacker to perform arbitrary actions.\u003c/li\u003e\n\u003cli\u003eThe attacker achieves arbitrary code execution as root on the Modoboa server.\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 with Reseller-level access (or higher) to execute arbitrary OS commands on the mail server, typically running as root. This grants the attacker complete control over the system, enabling them to read sensitive data, modify configurations, install malware, and disrupt email services. Given that all identified vulnerable code paths are reachable through normal application workflows, the impact is significant, potentially affecting all Modoboa deployments running vulnerable versions.\u003c/p\u003e\n\u003ch2 id=\"recommendation\"\u003eRecommendation\u003c/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUpgrade Modoboa to a version greater than 2.7.0 to patch CVE-2026-27602.\u003c/li\u003e\n\u003cli\u003eDeploy the following Sigma rule to detect command injection attempts via domain name creation, monitoring process creation for the execution of commands with injected shell metacharacters in domain names.\u003c/li\u003e\n\u003cli\u003eImplement input validation and sanitization measures on domain name fields to prevent the injection of shell metacharacters.\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-modoboa-command-injection/","summary":"Modoboa versions 2.7.0 and earlier are vulnerable to OS command injection, allowing a Reseller or SuperAdmin to execute arbitrary OS commands on the server by injecting shell metacharacters into a domain name due to unsanitized input in the `exec_cmd()` function.","title":"Modoboa \u003c= 2.7.0 OS Command Injection Vulnerability","url":"https://feed.craftedsignal.io/briefs/2024-01-modoboa-command-injection/"}],"language":"en","title":"CraftedSignal Threat Feed - Modoboa","version":"https://jsonfeed.org/version/1.1"}