{"id":"CVE-2023-0656","published":"2023-03-02T00:00:00Z","modified":"2025-03-07T17:28:09Z","title":"A Stack-based buffer overflow vulnerability in the SonicOS allows a remote unauthenticated attacker to cause Denial of…","vendor":"SonicWall","product":"SonicOS","tier":"core","eol":null,"affectedVersions":[{"vendor":"SonicWall","product":"SonicOS","versions":["SonicOS NSv 6.5.4.4-44v-21-1551 and earlier","SonicOS NSsp 7.0.1-5083 and earlier","SonicOS 7.0.1-5095 and earlier"]}],"description":{"text":"A Stack-based buffer overflow vulnerability in the SonicOS allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.","provenance":"source","from":"CVE.org"},"summary":null,"cvss":null,"epss":{"score":0.41319,"percentile":0.98666,"date":"2026-10-29","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2024-09-12","exploitedFirstSeen":"2024-09-12","ransomware":false,"evidence":[{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-12&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-12"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-13&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-13"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-14&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-14"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-15&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-15"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-16&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-16"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-17&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-17"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-18&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-18"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-19&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-19"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-20&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-20"},{"url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-24&host_type=src&vulnerability=cve-2023-0656","date":"2024-09-24"}],"evidenceTotal":626,"provenance":"source"},"exploited":true,"otx":{"pulseCount":1,"pulses":[{"name":"Active Reconnaissance Campaign Targets SonicWall Firewalls Through Commercial Proxy Infrastructure","url":"https://otx.alienvault.com/pulse/69a55654ed949baeb335ea5d","created":"2026-03-02"}],"provenance":"machine"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"references":[{"url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0004","tags":[]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2023-12690","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-12690","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":0,"earliest":"2024-01-12","earliestUrl":"https://github.com/BishopFox/CVE-2022-22274_CVE-2023-0656","repos":[{"name":"BishopFox/CVE-2022-22274_CVE-2023-0656","url":"https://github.com/BishopFox/CVE-2022-22274_CVE-2023-0656","stars":19,"created":"2024-01-12"}]},"first":{"date":"2024-01-12","source":"PoC-in-GitHub","url":"https://github.com/BishopFox/CVE-2022-22274_CVE-2023-0656"},"provenance":"source"},"exploitRefs":[],"flow":[],"timeline":[{"date":"2023-03-02","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2023-0656","provenance":"source"},{"date":"2024-01-12","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/BishopFox/CVE-2022-22274_CVE-2023-0656","provenance":"source"},{"date":"2024-09-12","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://dashboard.shadowserver.org/statistics/honeypot/vulnerability/map/?day=2024-09-12&host_type=src&vulnerability=cve-2023-0656","provenance":"source"}],"speed":{"daysToPublicExploit":316,"firstExploitFrom":"PoC-in-GitHub","daysToKev":null},"priority":{"score":60.4,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 777 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.73,"detail":"percentile 0.9867"},{"name":"Named in threat 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