CVE Vulnerability

CVE-2019-8460

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.

5 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 10 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

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

Configuration 1

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

Published : 2019-08-26 08:15

Updated : 2021-08-02 05:15

NVD link : CVE-2019-8460

Mitre link : CVE-2019-8460

Products Affected
No products.
CWE
NVD-CWE-Other