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TI-2018-05057 Aliases CVE-2018-6922GHSA-hpq2-2fmq-c95r

Uncontrolled resource consumption in FreeBSD

Priority LOW 30CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-400.

Summary

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.

Why it matters now

EPSS 0.03185 88th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
FreeBSDFreeBSDAll versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10—No fix listedCNA
  • FreeBSD VendorFreeBSD Affected All versions prior to 11.2-RELEASE-p1, 11.1-RELEASE-p12, 10.4-RELEASE-p10 Fixed in — No fix listed CNA

CPE configurations NVD · 19

CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:10.4:-:*:*:*:*:*:*10.4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:*10.4 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:*10.4 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p4:*:*:*:*:*:*10.4 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p5:*:*:*:*:*:*10.4 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p6:*:*:*:*:*:*10.4 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:*10.4 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:*10.4 p8VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:*10.4 p9VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:-:*:*:*:*:*:*11.1VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:-:*:*:*:*:*:* Versions 10.4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p1:*:*:*:*:*:* Versions 10.4 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p3:*:*:*:*:*:* Versions 10.4 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p4:*:*:*:*:*:* Versions 10.4 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p5:*:*:*:*:*:* Versions 10.4 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p6:*:*:*:*:*:* Versions 10.4 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:* Versions 10.4 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p8:*:*:*:*:*:* Versions 10.4 p8 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:10.4:p9:*:*:*:*:*:* Versions 10.4 p9 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:-:*:*:*:*:*:* Versions 11.1 Vulnerable ·FreeBSD
Show 9 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:*11.1 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:*11.1 p11VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:*11.1 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:*11.1 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p5:*:*:*:*:*:*11.1 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p6:*:*:*:*:*:*11.1 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p7:*:*:*:*:*:*11.1 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:*11.1 p9VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:*11.2VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p1:*:*:*:*:*:* Versions 11.1 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p11:*:*:*:*:*:* Versions 11.1 p11 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p2:*:*:*:*:*:* Versions 11.1 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p4:*:*:*:*:*:* Versions 11.1 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p5:*:*:*:*:*:* Versions 11.1 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p6:*:*:*:*:*:* Versions 11.1 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p7:*:*:*:*:*:* Versions 11.1 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.1:p9:*:*:*:*:*:* Versions 11.1 p9 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:* Versions 11.2 Vulnerable ·FreeBSD

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-6922
  2. 2026-10-03 Alias added: GHSA-hpq2-2fmq-c95r

References

Patch 2

Advisory 1

  • TI-2011-04182 Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT… CVSS 2.0HIGH 10.0
  • TI-2007-03684 Integer overflow in print-bgp.c in the BGP dissector in tcpdump 3.9.6 and earlier allows… CVSS 3.1CRITICAL 9.8
  • TI-2002-00376 Integer overflow in xdr_array function in RPC servers for operating systems that use… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2003-00437 Off-by-one error in the fb_realpath() function, as derived from the realpath function in… CVSS 3.1CRITICAL 9.8
  • TI-2003-00642 The prescan function in Sendmail 8.12.9 allows remote attackers to execute arbitrary code… CVSS 2.0HIGH 10.0
See all 576 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences