CVE-2025-59346: Dragonfly server-side request forgery vulnerability
Impact There are multiple server-side request forgery (SSRF) vulnerabilities in the DragonFly2 system. The vulnerabilities enable users to force DragonFly2’s components to make requests to internal services, which otherwise are not accessible to the users. One SSRF attack vector is exposed by the Manager’s API. The API allows users to create jobs. When creating a Preheat type of a job, users provide a URL that the Manager connects to (see figures 2.1–2.3). The URL is weakly validated, and so users can trick the Manager into sending HTTP requests to services that are in the Manager’s local network.
golang func (p preheat) CreatePreheat(ctx context.Context, schedulers []models.Scheduler, json types.PreheatArgs) (internaljob.GroupJobState, error) { [skipped] url := json.URL [skipped] // Generate download files var files []internaljob.PreheatRequest switch PreheatType(json.Type) { case PreheatImageType: // Parse image manifest url skipped, err := parseAccessURL(url) [skipped] [skipped] case PreheatFileType: [skipped] }
A second attack vector is in peer-to-peer communication. A peer can ask another peer to make a request to an arbitrary URL by triggering the pieceManager.DownloadSource method (figure 2.4), which calls the httpSourceClient.GetMetadata method, which performs the request.
Another attack vector is due to the fact that HTTP clients used by the DragonFly2’s components do not disable support for HTTP redirects. This configuration means that an HTTP request sent to a malicious server may be redirected by the server to a component’s internal service.
Patches - Dragonfy v2.1.0 and above.
Workarounds
There are no effective workarounds, beyond upgrading.
References
A third party security audit was performed by Trail of Bits, you can see the full report.
If you have any questions or comments about this advisory, please email us at dragonfly-maintainers@googlegroups.com.
Other sources
Dragonfly is an open source P2P-based file distribution and image acceleration system. Versions prior to 2.1.0 contain a server-side request forgery (SSRF) vulnerability that enables users to force DragonFly2’s components to make requests to internal services that are otherwise not accessible to them. The issue arises because the Manager API accepts a user-supplied URL when creating a Preheat job with weak validation, peers can trigger other peers to fetch an arbitrary URL through pieceManager.DownloadSource, and internal HTTP clients follow redirects, allowing a request to a malicious server to be redirected to internal services. This can be used to probe or access internal HTTP endpoints. The vulnerability is fixed in version 2.1.0.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-59346?
CVE-2025-59346 has been identified as a critical vulnerability due to its potential for allowing unauthorized internal service access through SSRF attacks.
How do I fix CVE-2025-59346?
To remediate CVE-2025-59346, upgrade the DragonFly system to version 2.1.0 or later.
What are the potential impacts of CVE-2025-59346?
CVE-2025-59346 could allow attackers to exploit internal services that should not be exposed, leading to unauthorized information disclosure or further attacks.
Which versions of the DragonFly system are affected by CVE-2025-59346?
CVE-2025-59346 affects all versions of the DragonFly system before version 2.1.0.
Who can exploit CVE-2025-59346?
Any user with access to the vulnerable components of the DragonFly system can potentially exploit CVE-2025-59346 through crafted requests.