{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2023-20244", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-20244", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2023-11-01T16:50:33.517Z", "updatedAt": "2024-08-02T09:05:36.212Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": null, "summary": "A vulnerability in the internal packet processing of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series Firewalls could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain packets when they are sent to the inspection engine. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to deplete all 9,472 byte blocks on the device, resulting in traffic loss across the device or an unexpected reload of the device. If the device does not reload on its own, a manual reload of the device would be required to recover from this state.", "affected": [ { "vendor": "Cisco", "product": "Cisco Firepower Threat Defense Software", "versions": [ { "version": "6.2.3", "status": "affected" }, { "version": "6.2.3.1", "status": "affected" }, { "version": "6.2.3.2", "status": "affected" }, { "version": "6.2.3.3", "status": "affected" }, { "version": "6.2.3.4", "status": "affected" }, { "version": "6.2.3.5", "status": "affected" }, { "version": "6.2.3.6", "status": "affected" }, { "version": "6.2.3.7", "status": "affected" }, { "version": "6.2.3.8", "status": "affected" }, { "version": "6.2.3.10", "status": "affected" }, { "version": "6.2.3.11", "status": "affected" }, { "version": "6.2.3.9", "status": "affected" }, { "version": "6.2.3.12", "status": "affected" }, { "version": "6.2.3.13", "status": "affected" }, { "version": "6.2.3.14", "status": "affected" }, { "version": "6.2.3.15", "status": "affected" }, { "version": "6.2.3.16", "status": "affected" }, { "version": "6.2.3.17", "status": "affected" }, { "version": "6.2.3.18", "status": "affected" }, { "version": "6.6.0", "status": "affected" }, { "version": "6.6.0.1", "status": "affected" }, { "version": "6.6.1", "status": "affected" }, { "version": "6.6.3", "status": "affected" }, { "version": "6.6.4", "status": "affected" }, { "version": "6.6.5", "status": "affected" }, { "version": "6.6.5.1", "status": "affected" }, { "version": "6.6.5.2", "status": "affected" }, { "version": "6.6.7", "status": "affected" }, { "version": "6.6.7.1", "status": "affected" }, { "version": "6.4.0", "status": "affected" }, { "version": "6.4.0.1", "status": "affected" }, { "version": "6.4.0.3", "status": "affected" }, { "version": "6.4.0.2", "status": "affected" }, { "version": "6.4.0.4", "status": "affected" }, { "version": "6.4.0.5", "status": "affected" }, { "version": "6.4.0.6", "status": "affected" }, { "version": "6.4.0.7", "status": "affected" }, { "version": "6.4.0.8", "status": "affected" }, { "version": "6.4.0.9", "status": "affected" }, { "version": "6.4.0.10", "status": "affected" }, { "version": "6.4.0.11", "status": "affected" }, { "version": "6.4.0.12", "status": "affected" }, { "version": "6.4.0.13", "status": "affected" }, { "version": "6.4.0.14", "status": "affected" }, { "version": "6.4.0.15", "status": "affected" }, { "version": "6.4.0.16", "status": "affected" }, { "version": "6.7.0", "status": "affected" }, { "version": "6.7.0.1", "status": "affected" }, { "version": "6.7.0.2", "status": "affected" }, { "version": "6.7.0.3", "status": "affected" }, { "version": "7.0.0", "status": "affected" }, { "version": "7.0.0.1", "status": "affected" }, { "version": "7.0.1", "status": "affected" }, { "version": "7.0.1.1", "status": "affected" }, { "version": "7.0.2", "status": "affected" }, { "version": "7.0.2.1", "status": "affected" }, { "version": "7.0.3", "status": "affected" }, { "version": "7.0.4", "status": "affected" }, { "version": "7.0.5", "status": "affected" }, { "version": "7.1.0", "status": "affected" }, { "version": "7.1.0.1", "status": "affected" }, { "version": "7.1.0.3", "status": "affected" }, { "version": "7.2.0", "status": "affected" }, { "version": "7.2.0.1", "status": "affected" }, { "version": "7.2.1", "status": "affected" }, { "version": "7.2.2", "status": "affected" }, { "version": "7.2.3", "status": "affected" }, { "version": "7.3.0", "status": "affected" }, { "version": "7.3.1", "status": "affected" }, { "version": "7.3.1.1", "status": "affected" } ] } ] } } }