CVE Vulnerability

CVE-2018-6922

One of the data structures that holds TCP segments in all versions of FreeBSD prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, and 10.4-RELEASE-p10 uses an inefficient algorithm to reassemble the data. This causes the CPU time spent on segment processing to grow linearly with the number of segments in the reassembly queue. An attacker who has the ability to send TCP traffic to a victim system can degrade the victim system's network performance and/or consume excessive CPU by exploiting the inefficiency of TCP reassembly handling, with relatively small bandwidth cost.

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

5.3 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References
Link Resource
https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc Patch Vendor Advisory
http://www.securitytracker.com/id/1041425 Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/105058 Third Party Advisory VDB Entry
https://security.netapp.com/advisory/ntap-20180815-0002/ Third Party Advisory
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html Patch
Configurations

Configuration 1

cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:10.4:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.1:-:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:*
Information

Published : 2018-08-09 06:29

Updated : 2019-10-09 11:42

NVD link : CVE-2018-6922

Mitre link : CVE-2018-6922

Products Affected
No products.
CWE
CWE-400