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TI-2024-13296 Aliases CVE-2024-20363GHSA-fgmg-8v8r-jj8g

Authentication bypass by spoofing in Cisco Firepower Threat Defense Software

Priority LOW 32CWE-290Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-290.

Summary

Multiple Cisco products are affected by a vulnerability in the Snort Intrusion Prevention System (IPS) rule engine that could allow an unauthenticated, remote attacker to bypass the configured rules on an affected system. This vulnerability is due to incorrect HTTP packet handling. An attacker could exploit this vulnerability by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass configured IPS rules and allow uninspected traffic onto the network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00366 30th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco Firepower Threat Defense Software7.4.0—No fix listedCNA
CiscoCisco UTD SNORT IPS Engine Software17.6.4; 17.6.5; 17.12.1a; 17.12.2—No fix listedCNA
  • Cisco Firepower Threat Defense Software VendorCisco Affected 7.4.0 Fixed in — No fix listed CNA
  • Cisco UTD SNORT IPS Engine Software VendorCisco Affected 17.6.4; 17.6.5; 17.12.1a; 17.12.2 Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:*:*:*:*:*:*:*7.4.0VulnerableCisco
cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.6.4:*:*:*:*:*:*:*17.6.4VulnerableCisco
cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.6.5:*:*:*:*:*:*:*17.6.5VulnerableCisco
cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.12.1a:*:*:*:*:*:*:*17.12.1aVulnerableCisco
cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.12.2:*:*:*:*:*:*:*17.12.2VulnerableCisco
cpe:2.3:a:cisco:snort:*:*:*:*:*:*:*:*3.0.0-233 to before 3.1.69.0VulnerableCisco
  • cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:*:*:*:*:*:*:* Versions 7.4.0 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.6.4:*:*:*:*:*:*:* Versions 17.6.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.6.5:*:*:*:*:*:*:* Versions 17.6.5 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.12.1a:*:*:*:*:*:*:* Versions 17.12.1a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.12.2:*:*:*:*:*:*:* Versions 17.12.2 Vulnerable ·Cisco
  • cpe:2.3:a:cisco:snort:*:*:*:*:*:*:*:* Versions 3.0.0-233 to before 3.1.69.0 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-20363
  2. 2026-10-03 Alias added: GHSA-fgmg-8v8r-jj8g

References

Advisory 1

  • TI-2025-14628 Buffer overflow in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.9
  • TI-2021-19919 Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints KEVCVSS 3.1CRITICAL 10.0
  • TI-2023-06973 Authentication bypass in Cisco Adaptive Security Appliance Software KEVCVSS 3.1CRITICAL 9.1
  • TI-2026-82192 Denial of service in Cisco Secure Firewall ASA and FTD SSL VPN KEVCVSS 3.1HIGH 8.6
  • TI-2026-16533 Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense… KEVCVSS 3.1HIGH 8.6
  • TI-2025-14657 Missing authorization in Cisco Secure Firewall Adaptive Security Appliance Software KEVCVSS 3.1HIGH 8.6
See all 276 →

Sources

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