Read the docs
TI-2020-13229 Aliases CVE-2020-17469GHSA-ggpj-5v2h-5jrp

An issue was discovered in FNET through 4.6.4.

Priority LOW 38CWE-824Published · 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 · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-824 and the CVSS impact.

Summary

An issue was discovered in FNET through 4.6.4. The code for IPv6 fragment reassembly tries to access a previous fragment starting from a network incoming fragment that still doesn't have a reference to the previous one (which supposedly resides in the reassembly list). When faced with an incoming fragment that belongs to a non-empty fragment list, IPv6 reassembly must check that there are no empty holes between the fragments: this leads to an uninitialized pointer dereference in _fnet_ip6_reassembly in fnet_ip6.c, and causes Denial-of-Service.

Why it matters now

EPSS 0.02992 87th 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
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:butok:fnet:*:*:*:*:*:*:*:*up to 4.6.4VulnerableButok
  • cpe:2.3:a:butok:fnet:*:*:*:*:*:*:*:* Versions up to 4.6.4 Vulnerable ·Butok

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-17469
  2. 2026-10-03 Alias added: GHSA-ggpj-5v2h-5jrp

References

Advisory 3

  • TI-2020-16750 In FNET 4.6.3, TCP ISNs are improperly random. CVSS 3.1CRITICAL 9.1
  • TI-2020-14924 An issue was discovered in FNET through 4.6.4. CVSS 3.1CRITICAL 9.1
  • TI-2020-13227 An issue was discovered in FNET through 4.6.4. CVSS 3.1CRITICAL 9.1
  • TI-2020-13228 An issue was discovered in FNET through 4.6.4. CVSS 3.1HIGH 7.5
  • TI-2020-13230 An issue was discovered in FNET through 4.6.4. CVSS 3.1MEDIUM 5.3

Sources

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