Threat Intelligence Database

The cisco_firesight_manager_ACL_rule_export module in misp-modules generates a shell script (.sh) that authenticates to and calls the Cisco fireSIGHT Manager API. The module interpolates configuration values (IP address, login, password, domain ID, policy ID) and MISP attribute values (destination IPs, URLs, event info comments) directly into single-quoted shell string assignments without any escaping or sanitization. Because the values are placed inside single-quoted shell strings, any value containing a single-quote character (e.g., a crafted ip-dst or url attribute value submitted to MISP) breaks out of the quoting context, allowing an attacker to inject arbitrary shell commands into the exported script. A security analyst who subsequently executes the generated .sh file unmodified would run the injected commands with their own privileges, potentially exposing fireSIGHT Manager credentials, modifying ACL rules, or compromising the analyst workstation. Additionally, the module contained a secondary defect where the variable 'config' was only assigned inside a conditional block but referenced unconditionally afterward, causing a NameError (denial of service) when the request payload lacked a 'config' key. The vulnerability requires the attacker to have the ability to submit MISP events or attributes containing a single-quote character and the victim to execute the exported script. No authentication bypass is required beyond standard MISP event-submission privileges.

CVE-2026-62143 is a Server-Side Request Forgery (SSRF) vulnerability in the html_to_markdown expansion module of misp-modules. The module failed to normalize IPv4-mapped IPv6 addresses before checking them against blocked IP ranges, allowing an authenticated attacker to bypass SSRF protections. This could enable the attacker to make the server connect to internal services such as loopback, private, or link-local network addresses. The vulnerability has been fixed by normalizing IPv4-mapped IPv6 addresses and rejecting URLs without valid hostnames.

MISP misp-modules versions prior to 3.0.7 contain vulnerabilities related to improper certificate validation and unsafe remote resource fetching. Specifically, the html_to_markdown module allowed Server-Side Request Forgery (SSRF) via arbitrary HTTP(S) URLs without sufficient validation, potentially targeting internal network resources. The qrcode module disabled TLS certificate verification when retrieving remote images, exposing requests to man-in-the-middle attacks. These issues were addressed in version 3.0.7 by enforcing URL scheme validation, blocking local/private addresses, resolving hostnames before fetching, enforcing request timeouts, and re-enabling TLS certificate verification.

MISP modules are autonomous modules that can be used to extend MISP for new services. In 3.0.7 and earlier, a Cross-Site Request Forgery vulnerability in the MISP Modules website allowed an attacker to cause an authenticated user to submit unintended requests to the home endpoint. The vulnerability was due to the home blueprint being exempted from CSRF protection. This could allow modification of session query data in the context of the authenticated user. The issue was fixed by enabling CSRF protection for the affected blueprint and hardening query parsing.