FKIE_CVE-2024-20363

Vulnerability from fkie_nvd - Published: 2024-05-22 17:16 - Updated: 2026-08-11 19:33
Severity
5.8 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
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.
References
psirt@cisco.comhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-ips-bypass-uE69KBMdVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-ips-bypass-uE69KBMdVendor Advisory
Impacted products
Vendor Product Version
cisco secure_firewall_threat_defense 7.4.0
cisco unified_threat_defense_snort_intrusion_prevention_system_engine 17.6.4
cisco unified_threat_defense_snort_intrusion_prevention_system_engine 17.6.5
cisco unified_threat_defense_snort_intrusion_prevention_system_engine 17.12.1a
cisco unified_threat_defense_snort_intrusion_prevention_system_engine 17.12.2
cisco snort *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Cisco Firepower Threat Defense Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "7.4.0"
            }
          ]
        },
        {
          "product": "Cisco UTD SNORT IPS Engine Software",
          "vendor": "Cisco",
          "versions": [
            {
              "status": "affected",
              "version": "17.6.4"
            },
            {
              "status": "affected",
              "version": "17.6.5"
            },
            {
              "status": "affected",
              "version": "17.12.1a"
            },
            {
              "status": "affected",
              "version": "17.12.2"
            }
          ]
        }
      ],
      "source": "psirt@cisco.com"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:cisco:firepower_threat_defense:7.4.0:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "unknown",
          "product": "firepower_threat_defense",
          "vendor": "cisco",
          "versions": [
            {
              "status": "affected",
              "version": "7.4.0"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:cisco:snort_intrusion_prevention_system:17.6.4:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "affected",
          "product": "snort_intrusion_prevention_system",
          "vendor": "cisco",
          "versions": [
            {
              "status": "affected",
              "version": "17.6.4"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:cisco:snort_intrusion_prevention_system:17.6.5:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "affected",
          "product": "snort_intrusion_prevention_system",
          "vendor": "cisco",
          "versions": [
            {
              "status": "affected",
              "version": "17.6.5"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:cisco:snort_intrusion_prevention_system:17.12.1a:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "affected",
          "product": "snort_intrusion_prevention_system",
          "vendor": "cisco",
          "versions": [
            {
              "status": "affected",
              "version": "17.12.1a"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:cisco:snort_intrusion_prevention_system:17.12.2:*:*:*:*:*:*:*"
          ],
          "defaultStatus": "affected",
          "product": "snort_intrusion_prevention_system",
          "vendor": "cisco",
          "versions": [
            {
              "status": "affected",
              "version": "17.12.2"
            }
          ]
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cisco:secure_firewall_threat_defense:7.4.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "5BC88149-095A-41DE-AA27-1CFD21125EF4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.6.4:*:*:*:*:*:*:*",
              "matchCriteriaId": "90DCBE28-910B-418E-AD93-EA0BB69913D7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.6.5:*:*:*:*:*:*:*",
              "matchCriteriaId": "EED24474-335B-4595-A4B1-A2F1E9590AFC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.12.1a:*:*:*:*:*:*:*",
              "matchCriteriaId": "8FC4D3D8-4391-4ED6-B27B-EF47C96904CD",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:cisco:unified_threat_defense_snort_intrusion_prevention_system_engine:17.12.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "60AE1B18-3CEB-45B3-A43D-3C6DCC1F20F3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:cisco:snort:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F36998E8-E48F-4EE5-84C0-31DE3956F313",
              "versionEndExcluding": "3.1.69.0",
              "versionStartIncluding": "3.0.0-233",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Varios productos de Cisco se ven afectados por una vulnerabilidad en el motor de reglas del Snort Intrusion Prevention System (IPS) que podr\u00eda permitir a un atacante remoto no autenticado eludir las reglas configuradas en un sistema afectado. Esta vulnerabilidad se debe a un manejo incorrecto de paquetes HTTP. Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando paquetes HTTP manipulados a trav\u00e9s de un dispositivo afectado. Un exploit exitoso podr\u00eda permitir al atacante eludir las reglas IPS configuradas y permitir el ingreso de tr\u00e1fico no inspeccionado a la red."
    }
  ],
  "id": "CVE-2024-20363",
  "lastModified": "2026-08-11T19:33:44.513",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "psirt@cisco.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-20363",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-05-22T17:52:45.758246Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-22T17:16:13.950",
  "references": [
    {
      "source": "psirt@cisco.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-ips-bypass-uE69KBMd"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort3-ips-bypass-uE69KBMd"
    }
  ],
  "sourceIdentifier": "psirt@cisco.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ],
      "source": "psirt@cisco.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-290"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.