CVE-2019-8460 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.00688.

Key SSVC decision points have not yet been added.

Vendors	Products
Openbsd	Openbsd

Configuration 1 [-]

cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*

No data.

No data.

Advisories

Source	ID	Title
EUVD	EUVD-2019-17850	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.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig
https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f
https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/
https://security.netapp.com/advisory/ntap-20190905-0001/
https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03

History

No history.

MITRE

Status: PUBLISHED

Assigner: checkpoint

Published: 2019-08-26T19:18:49

Updated: 2024-08-04T21:17:31.425Z

Reserved: 2019-02-18T00:00:00

Link: CVE-2019-8460

Vulnrichment

No data.

NVD

Status : Modified

Published: 2019-08-26T20:15:10.030

Modified: 2024-11-21T04:49:56.840

Link: CVE-2019-8460

Redhat

No data.

OpenCVE Enrichment

No data.

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