Username timing attack on recover password/MFA token in vantage6
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-208.
Summary
vantage6 is an open source framework built to enable, manage and deploy privacy enhancing technologies like Federated Learning and Multi-Party Computation. Much like GHSA-45gq-q4xh-cp53, it is possible to find which usernames exist in vantage6 by calling the API routes `/recover/lost` and `/2fa/lost`. These routes send emails to users if they have lost their password or MFA token. This issue has been addressed in commit `aecfd6d0e` and is expected to ship in subsequent releases. Users are advised to upgrade as soon as a new release is available. There are no known workarounds for this vulnerability.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| vantage6 | vantage6 | up to 4.2.2 | — | No fix listed | CNA |
| — | vantage6 (PyPI) | before 4.3.0 | 4.3.0 | Patch available | GHSA-5h3x-6gwf-73jm |
- vantage6 Vendorvantage6 Affected up to 4.2.2 Fixed in — No fix listed CNA
- vantage6 (PyPI) Vendor— Affected before 4.3.0 Fixed in 4.3.0 Patch available GHSA-5h3x-6gwf-73jm
Remediation
- Fix · GHSA-5h3x-6gwf-73jm vantage6 (PyPI) Fixed in 4.3.0 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2024-24770
- 2026-10-03 Alias added: GHSA-5h3x-6gwf-73jm
References
Advisory 2
More Vantage6 vulnerabilities
- TI-2024-14786 vantage6 unencrypted task can be created in encrypted collaboration CVSS 3.1MEDIUM 4.3
- TI-2024-14378 vantage6 insecure SSH configuration for node and server containers CVSS 3.1CRITICAL 9.8
- TI-2024-14374 Remote code execution in vantage6 CVSS 3.1HIGH 8.8
- TI-2023-09727 Refresh tokens do not expire in Vantage6 CVSS 3.1HIGH 8.8
- TI-2023-25773 vantage6 Node accepts non-whitelisted algorithms from malicious server CVSS 3.1HIGH 8.8
- TI-2023-09728 vantage6's Pickle serialization is insecure CVSS 3.1HIGH 7.2
Sources
- CVE-2024-24770 · CVE Program
- CVE-2024-24770 · NVD
- FIRST EPSS
- GHSA-5h3x-6gwf-73jm · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences