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TI-2006-06674 Aliases CVE-2006-6931GHSA-xxx2-77cj-f65h

Algorithmic complexity vulnerability in Snort before 2.6.1, during predicate evaluation…

Priority LOW 28Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA.

Summary

Algorithmic complexity vulnerability in Snort before 2.6.1, during predicate evaluation in rule matching for certain rules, allows remote attackers to cause a denial of service (CPU consumption and detection outage) via crafted network traffic, aka a "backtracking attack."

Why it matters now

EPSS 0.02449 84th 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:snort:snort:*:*:*:*:*:*:*:*up to 2.6.2VulnerableSnort
  • cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:* Versions up to 2.6.2 Vulnerable ·Snort

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2006-6931
  2. 2026-10-03 Alias added: GHSA-xxx2-77cj-f65h

References

Advisory 4

Other 6

  • TI-2006-05090 Stack-based buffer overflow in the DCE/RPC preprocessor in Snort before 2.6.1.3, and 2.7… CVSS 2.0HIGH 10.0
  • TI-2003-00029 Buffer overflow in the RPC preprocessor for Snort 1.8 and 1.9.x before 1.9.1 allows… CVSS 2.0HIGH 10.0
  • TI-2009-03477 Snort before 2.8.5.1, when the -v option is enabled, allows remote attackers to cause a… CVSS 2.0MEDIUM 4.3
  • TI-2016-01306 Untrusted search path vulnerability in Snort 2.9.7.0-WIN32 allows remote attackers to… CVSS 3.0HIGH 8.8
  • TI-2021-00950 Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability CVSS 3.1HIGH 7.5
  • TI-2007-01340 The frag3 preprocessor in Snort 2.6.1.1, 2.6.1.2, and 2.7.0 beta, when configured for… CVSS 2.0HIGH 7.1
See all 17 →

Sources

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