{ "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-2023-20083", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-20083", "idYear": 2023, "status": "PUBLISHED", "publishedAt": "2023-11-01T17:16:49.598Z", "updatedAt": "2024-08-02T08:57:35.550Z", "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 ICMPv6 inspection when configured with the Snort 2 detection engine for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the CPU of an affected device to spike to 100 percent, which could stop all traffic processing and result in a denial of service (DoS) condition. FTD management traffic is not affected by this vulnerability. This vulnerability is due to improper error checking when parsing fields within the ICMPv6 header. An attacker could exploit this vulnerability by sending a crafted ICMPv6 packet through an affected device. A successful exploit could allow the attacker to cause the device to exhaust CPU resources and stop processing traffic, resulting in a DoS condition. Note: To recover from the DoS condition, the Snort 2 Detection Engine or the Cisco FTD device may need to be restarted.", "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": "6.4.0.17", "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": "7.1.0.2", "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" } ] } ] } } }