vulnwire
5.3med

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-…

Published 8 y ago · modified 4 mo ago · JSON

CVSS
5.3
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
3.2%
percentile 88%
Public exploits
0
none known

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.

Exploit prediction (EPSS)

3.19% probability of exploitation in the next 30 days, higher than 88% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.05.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • FreeBSD FreeBSD

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

  • freebsd.org /security/advisories/FreeBSD-SA-18:08.tcp.asc · vendor-advisory, x_refsource_FREEBSD, x_transferred
  • securitytracker.com /id/1041425 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • oracle.com /technetwork/security-advisory/cpujan2019-5072801.html · x_refsource_CONFIRM, x_transferred
  • securityfocus.com /bid/105058 · vdb-entry, x_refsource_BID, x_transferred
  • security.netapp.com /advisory/ntap-20180815-0002/ · x_refsource_CONFIRM, x_transferred

Sources

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