{"id":"CVE-2024-6594","state":"PUBLISHED","title":"WatchGuard Firebox Single Sign-On Client Denial-of-Service","description":"Improper Handling of Exceptional Conditions vulnerability in the WatchGuard Single Sign-On Client on Windows causes the client to crash while handling malformed commands. An attacker with network access to the client could create a denial of service condition for the Single Sign-On service by repeatedly issuing malformed commands.","publishedAt":"2024-09-25T11:22:45.610Z","updatedAt":"2026-08-07T23:42:26.069Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","source":"WatchGuard"},"assigner":"WatchGuard","products":["WatchGuard SSO Client"],"affected":[{"vendor":"WatchGuard","product":"SSO Client","defaultStatus":"unaffected","versions":[{"version":"12.0","status":"affected","lessThanOrEqual":"12.7","versionType":"semver"}],"platforms":["Windows"]}],"references":["https://www.redteam-pentesting.de/advisories/rt-sa-2024-008","https://psirt.watchguard.com/CVE-2024-6594","https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2024-00016"],"weaknesses":["CWE-755"],"ingestedAt":"2026-10-29T20:08:12.933Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/6xxx/CVE-2024-6594.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-6594","state":"PUBLISHED","datePublished":"2024-09-25T11:22:45.610Z","dateUpdated":"2026-08-07T23:42:26.069Z","assignerShortName":"WatchGuard","assignerOrgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","dateReserved":"2024-07-09T02:09:05.229Z"},"containers":{"cna":{"title":"WatchGuard Firebox Single Sign-On Client Denial-of-Service","descriptions":[{"lang":"en","value":"Improper Handling of Exceptional Conditions vulnerability in the WatchGuard Single Sign-On Client on Windows causes the client to crash while handling malformed commands. An attacker with network access to the client could create a denial of service condition for the Single Sign-On service by repeatedly issuing malformed commands."}],"affected":[{"vendor":"WatchGuard","product":"SSO Client","defaultStatus":"unaffected","versions":[{"version":"12.0","status":"affected","lessThanOrEqual":"12.7","versionType":"semver"}],"platforms":["Windows"]}],"references":[{"url":"https://www.redteam-pentesting.de/advisories/rt-sa-2024-008","tags":["technical-description"]},{"url":"https://psirt.watchguard.com/CVE-2024-6594","tags":["vendor-advisory"]},{"url":"https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2024-00016","tags":["vendor-advisory"]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","baseScore":8.7,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-755","lang":"en","description":"CWE-755","type":"CWE"}]}],"providerMetadata":{"shortName":"WatchGuard","orgId":"5d1c2695-1a31-4499-88ae-e847036fd7e3","dateUpdated":"2026-08-07T23:42:26.069Z"},"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:watchguard:sso_client:*:*:*:*:*:*:*:*","versionStartIncluding":"12.0","versionEndIncluding":"12.7"}]}]}],"workarounds":[{"lang":"en","value":"An attacker must have already established network access to exploit this vulnerability. WatchGuard recommends using Windows Firewall rules to restrict TCP port 4116 network access to the Single Sign-On Client to only allow connections from the Authentication Gateway (SSO Agent). Windows administrators can use Group Policy objects to add Windows firewall rules to their endpoints."}],"exploits":[{"lang":"en","value":"WatchGuard is not aware of any exploitation of this vulnerability in the wild."}],"datePublic":"2024-09-25T11:22:45.610Z"},"adp":[{"title":"CISA ADP Vulnrichment","affected":[{"vendor":"watchguard","product":"single_sign-on_client","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"12.7","versionType":"semver"}],"cpes":["cpe:2.3:a:watchguard:single_sign-on_client:*:*:*:*:*:windows:*:*"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-09-25T13:44:40.431549Z","id":"CVE-2024-6594","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-25T14:30:29.866Z"}}]}}}