Search criteria
6 vulnerabilities found for fastd by fastd_project
FKIE_CVE-2025-24356
Vulnerability from fkie_nvd - Published: 2025-01-27 18:15 - Updated: 2025-08-27 02:15
Severity ?
Summary
fastd is a VPN daemon which tunnels IP packets and Ethernet frames over UDP. When receiving a data packet from an unknown IP address/port combination, fastd will assume that one of its connected peers has moved to a new address and initiate a reconnect by sending a handshake packet. This "fast reconnect" avoids having to wait for a session timeout (up to ~90s) until a new connection is established. Even a 1-byte UDP packet just containing the fastd packet type header can trigger a much larger handshake packet (~150 bytes of UDP payload). Including IPv4 and UDP headers, the resulting amplification factor is roughly 12-13. By sending data packets with a spoofed source address to fastd instances reachable on the internet, this amplification of UDP traffic might be used to facilitate a Distributed Denial of Service attack. This vulnerability is fixed in v23.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| fastd_project | fastd | * |
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FKIE_CVE-2020-27638
Vulnerability from fkie_nvd - Published: 2020-10-22 13:15 - Updated: 2024-11-21 05:21
Severity ?
Summary
receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| fastd_project | fastd | * | |
| debian | debian_linux | 9.0 | |
| fedoraproject | fedora | 31 | |
| fedoraproject | fedora | 32 | |
| fedoraproject | fedora | 33 |
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CVE-2025-24356 (GCVE-0-2025-24356)
Vulnerability from cvelistv5 – Published: 2025-01-27 17:31 – Updated: 2025-01-28 15:39
VLAI?
Title
UDP traffic amplification via fastd's fast reconnect feature
Summary
fastd is a VPN daemon which tunnels IP packets and Ethernet frames over UDP. When receiving a data packet from an unknown IP address/port combination, fastd will assume that one of its connected peers has moved to a new address and initiate a reconnect by sending a handshake packet. This "fast reconnect" avoids having to wait for a session timeout (up to ~90s) until a new connection is established. Even a 1-byte UDP packet just containing the fastd packet type header can trigger a much larger handshake packet (~150 bytes of UDP payload). Including IPv4 and UDP headers, the resulting amplification factor is roughly 12-13. By sending data packets with a spoofed source address to fastd instances reachable on the internet, this amplification of UDP traffic might be used to facilitate a Distributed Denial of Service attack. This vulnerability is fixed in v23.
Severity ?
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2020-27638 (GCVE-0-2020-27638)
Vulnerability from cvelistv5 – Published: 2020-10-22 12:27 – Updated: 2024-08-04 16:18
VLAI?
Summary
receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
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CVE-2025-24356 (GCVE-0-2025-24356)
Vulnerability from nvd – Published: 2025-01-27 17:31 – Updated: 2025-01-28 15:39
VLAI?
Title
UDP traffic amplification via fastd's fast reconnect feature
Summary
fastd is a VPN daemon which tunnels IP packets and Ethernet frames over UDP. When receiving a data packet from an unknown IP address/port combination, fastd will assume that one of its connected peers has moved to a new address and initiate a reconnect by sending a handshake packet. This "fast reconnect" avoids having to wait for a session timeout (up to ~90s) until a new connection is established. Even a 1-byte UDP packet just containing the fastd packet type header can trigger a much larger handshake packet (~150 bytes of UDP payload). Including IPv4 and UDP headers, the resulting amplification factor is roughly 12-13. By sending data packets with a spoofed source address to fastd instances reachable on the internet, this amplification of UDP traffic might be used to facilitate a Distributed Denial of Service attack. This vulnerability is fixed in v23.
Severity ?
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2020-27638 (GCVE-0-2020-27638)
Vulnerability from nvd – Published: 2020-10-22 12:27 – Updated: 2024-08-04 16:18
VLAI?
Summary
receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||
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"name": "https://bugs.debian.org/972521",
"refsource": "MISC",
"url": "https://bugs.debian.org/972521"
},
{
"name": "[debian-lts-announce] 20201025 [SECURITY] [DLA-2414-1] fastd security update",
"refsource": "MLIST",
"url": "https://lists.debian.org/debian-lts-announce/2020/10/msg00025.html"
},
{
"name": "FEDORA-2020-495c14a23f",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GUZ3AGTAXH7OOP45F5WXBVRQ3IDWUR7M/"
},
{
"name": "FEDORA-2020-01dc2bc62c",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSMH65GHKHMJAK2VMPROIPIUS4IA63CW/"
},
{
"name": "FEDORA-2020-13edfc3215",
"refsource": "FEDORA",
"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D2LNSF2LI4RQ7BVGHTJQUJWP7RVGHDTK/"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2020-27638",
"datePublished": "2020-10-22T12:27:04",
"dateReserved": "2020-10-22T00:00:00",
"dateUpdated": "2024-08-04T16:18:45.492Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}