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7.5
CVSSv3

CVE-2019-8460

Published: 26/08/2019 Updated: 02/08/2021
CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10
CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9
VMScore: 446
Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P
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Vulnerability Summary

OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.

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ICS Advisories

Siemens Industrial Products (Update P)
Critical Infrastructure Sectors: Chemical, Critical Manufacturing, Energy, Food and Agriculture, Water and Wastewater Systems

References

NVD-CWE-Otherhttps://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sighttps://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906fhttps://security.netapp.com/advisory/ntap-20190905-0001/https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03https://nvd.nist.govhttps://www.cisa.gov/uscert/ics/advisories/icsa-19-253-03
CVSSv3
CVSSv2
CVSSv3
VMScore
Recommendations:
CVE-2020-4463CVE-2024-3400deserializationCVE-2024-21788CVE-2023-42433CVE-2024-21841CVE-2024-22095local file inclusionmemory leak
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