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CVE-2019-8460 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URLSource(s)Tag(s)
https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig CVEExploitVendor Advisory
https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f CVEPatchThird Party Advisory
https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/ CVEExploitPatchPress/Media CoverageThird Party Advisory
https://security.netapp.com/advisory/ntap-20190905-0001/ CVEThird Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03 CVE

see all 10 references

Weakness Enumeration

CWE-IDCWE NameSource
NVD-CWE-OtherWeakness Not in a Standard CWE Category[email protected]
CWE-1049Excessive Data Query Operations in a Large Data Table[email protected]

Affected Products

ProductVersions
openbsd openbsd
<= 6.5

CPE

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

Remediation

  • No remediation found in references.

Change History

10 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2019-8460
NVD Published Date:
Aug 26, 2019
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2019-8460 Details - Not Deferred