CVE-2019-8460

Published: Aug 26, 2019Modified: Nov 21, 2024

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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.

Affected (1)

Products: Openbsd: Openbsd

Openbsd

1 product

Openbsd

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Openbsd Openbsd	Up to 6.5

Related CWEs

CWE-1049

Excessive Data Query Operations in a Large Data Table

The product performs a data query with a large number of joins and sub-queries on a large data table.

References (10)

https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig

Source: cve@checkpoint.com

ExploitVendor Advisory

https://github.com/openbsd/src/commit/ed8fdce754a5d8d14c09e989d8877707bd43906f

Source: cve@checkpoint.com

PatchThird Party Advisory

https://research.checkpoint.com/tcp-sack-security-issue-in-openbsd-cve-2019-8460/

Source: cve@checkpoint.com

ExploitPatchPress/Media CoverageThird Party Advisory

https://security.netapp.com/advisory/ntap-20190905-0001/

Source: cve@checkpoint.com

Third Party Advisory

https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03

Source: cve@checkpoint.com

https://ftp.openbsd.org/pub/OpenBSD/patches/6.5/common/006_tcpsack.patch.sig