CVE-2018-6922 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.3 MEDIUM
Vector:  CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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

Weakness Enumeration

CWE-ID CWE Name Source
CWE-400 Uncontrolled Resource Consumption cwe source acceptance level NIST   Reference acceptance level FreeBSD  

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-6922
NVD Published Date:
08/09/2018
NVD Last Modified:
10/09/2019
Source:
MITRE