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.

CVSS v3.0 7.5 HIGH
CVSS v2.0 5.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

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

5.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:N/C:N/I:N/A:P

Exploitability : 10.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

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 Press/Media Coverage Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-19-253-03

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Configurations

Configuration 1 (hide)

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

Information

Published : 2019-08-26 13:15

Updated : 2021-08-02 10:15

NVD link : CVE-2019-8460

Mitre link : CVE-2019-8460

JSON object : View

CWE

NVD-CWE-Other

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Products Affected

openbsd

openbsd

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