CVE-2020-27638
receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.
02 Description
receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.36% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 83.3% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-10-22 12:27Z6 YR AGO
- Last updated
- 2024-08-04 16:18Z2 YR AGO
- Reserved
- 2020-10-22
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-617Reachable AssertionBase
- Data version
- 5.1
- Document digest
- 11fef8efb8decc2863f165998a7b3c52dcf4887189ac30a5aef23d30ed341efd
05 Affected products
06 References
- fastd.readthedocs.iohttps://fastd.readthedocs.io/en/stable/releases/v21.html
- github.comhttps://github.com/NeoRaider/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea
- bugs.debian.orghttps://bugs.debian.org/972521
- lists.debian.org[debian-lts-announce] 20201025 [SECURITY] [DLA-2414-1] fastd security updatehttps://lists.debian.org/debian-lts-announce/2020/10/msg00025.html
- lists.fedoraproject.orgFEDORA-2020-495c14a23fhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUZ3AGTAXH7OOP45F5WXBVRQ3IDWUR7M/
- lists.fedoraproject.orgFEDORA-2020-01dc2bc62chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WSMH65GHKHMJAK2VMPROIPIUS4IA63CW/
- lists.fedoraproject.orgFEDORA-2020-13edfc3215https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D2LNSF2LI4RQ7BVGHTJQUJWP7RVGHDTK/
07 Fixed in
Debian 12
- fastd Fixed in 21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- fastd Fixed in 21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- fastd Fixed in 21-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- fastd Fixed in 17-4ubuntu0.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- fastd Fixed in 18-3ubuntu0.18.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- fastd Fixed in 18-3ubuntu0.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.