Vulnerability Monitor

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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.

Published

2018-08-09T18:29:00.277

Last Modified

2024-11-21T04:11:25.750

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.3 (MEDIUM)

CVSSv2 Vector

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

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Secondary
    CWE-400
  • Type: Primary
    CWE-400
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 10.4 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.1 Yes
Operating System freebsd freebsd 11.2 Yes
References