5.3

CVE-2018-6922: freebsd Uncontrolled Resource Consumption

CVSS: 5.3v3.0MediumModified
Published 09-08-2018Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2018-6922 is a medium (CVSS 5.3) Uncontrolled Resource Consumption vulnerability in freebsd. EPSS estimates a 3.19% chance of exploitation in the next 30 days, higher than 87.9% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.0 (NVD)
EPSS score
3.19%
0%100%
Low · -0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 09-08-2018
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

3.19%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

-0.04 pp

From 3.23% on 20-09-2026

20-09-202620-10-2026
EPSS score
3.19%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Freebsd1 product
  • freebsdEOLAll versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10 | 10.4 | 10.4:p1 | 10.4:p3 | 10.4:p4 | 10.4:p5 | 10.4:p6 | 10.4:p7 | 10.4:p8 | 10.4:p9 | 11.1 | 11.1:p1 | 11.1:p11 | 11.1:p2 | 11.1:p4 | 11.1:p5 | 11.1:p6 | 11.1:p7 | 11.1:p9 | 11.2

1 vendor · 1 product

References

5 links