CVE-2018-6922
FreeBSD TCP Segment Reassembly Vulnerability
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.
INFO
Published Date :
Aug. 9, 2018, 6:29 p.m.
Last Modified :
Oct. 9, 2019, 11:42 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-6922.
| URL | 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 |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-6922 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-6922 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Oct. 09, 2019
Action Type Old Value New Value Added CWE FreeBSD CWE-400 -
CWE Remap by [email protected]
Oct. 03, 2019
Action Type Old Value New Value Changed CWE CWE-399 CWE-399 CWE-400 -
Modified Analysis by [email protected]
Mar. 20, 2019
Action Type Old Value New Value Changed Reference Type https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html No Types Assigned https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html Patch Changed CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:* *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:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:*:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p10:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:* *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:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p8:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.2:*:*:*:*:*:*:* OR *cpe:2.3:o:freebsd:freebsd:10.4:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:* *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:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:-:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:* *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:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:* -
CVE Modified by [email protected]
Jan. 16, 2019
Action Type Old Value New Value Added Reference https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html [No Types Assigned] -
Initial Analysis by [email protected]
Oct. 11, 2018
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Changed Reference Type https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc No Types Assigned https://www.freebsd.org/security/advisories/FreeBSD-SA-18:08.tcp.asc Patch, Vendor Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20180815-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20180815-0002/ Third Party Advisory Changed Reference Type http://www.securityfocus.com/bid/105058 No Types Assigned http://www.securityfocus.com/bid/105058 Third Party Advisory, VDB Entry Changed Reference Type http://www.securitytracker.com/id/1041425 No Types Assigned http://www.securitytracker.com/id/1041425 Third Party Advisory, VDB Entry Added CWE CWE-399 Added CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:* *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:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:*:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p10:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p3:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:* *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:p7:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p8:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:* *cpe:2.3:o:freebsd:freebsd:11.2:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Aug. 16, 2018
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20180815-0002/ [No Types Assigned] -
CVE Modified by [email protected]
Aug. 14, 2018
Action Type Old Value New Value Added Reference http://www.securityfocus.com/bid/105058 [No Types Assigned] -
CVE Modified by [email protected]
Aug. 11, 2018
Action Type Old Value New Value Added Reference http://www.securitytracker.com/id/1041425 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-6922 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-6922
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.44 }} -0.03%
score
0.74263
percentile