CVE-2020-27638: receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code

High severity · published Oct 22, 2020

CVE-2020-27638

receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code

7.5

CVSS

2.4%

EPSS

On KEV

Description

receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)2.4% · higher than 84% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Debian Linux · Debian

9.0 · source: NVD

Fastd · Fastd Project

before 21.0 · source: NVD

Fedora · Fedoraproject

31; 32; 33 · source: NVD

Affected product

Debian Linux

Debian

All Debian Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2020-27638

CVE.org

https://www.cve.org/CVERecord?id=CVE-2020-27638

Issue Tracking

https://bugs.debian.org/972521

Broken Link

https://fastd.readthedocs.io/en/stable/releases/v21.html

Patch

https://github.com/NeoRaider/fastd/commit/737925113363b6130879729cdff9ccc46c33eaea

Mailing List

https://lists.debian.org/debian-lts-announce/2020/10/msg00025.html

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D2LNSF2LI4RQ7BVGHTJQUJWP7RVGHDTK/

lists.fedoraproject.org

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GUZ3AGTAXH7OOP45F5WXBVRQ3IDWUR7M/