{"affected":[{"affectedData":[{"product":"The Squid Software Foundation Squid","vendor":"The Squid Software Foundation","versions":[{"status":"affected","version":"3.5.27-20180318"}]}],"source":"zdi-disclosures@trendmicro.com"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:squid-cache:squid:3.5.27:*:*:*:*:*:*:*","matchCriteriaId":"D83BE9E6-CEAF-47B8-9501-68FC6AB94BB8","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"descriptions":[{"lang":"en","value":"This vulnerability allows remote attackers to deny service on vulnerable installations of The Squid Software Foundation Squid 3.5.27-20180318. Authentication is not required to exploit this vulnerability. The specific flaw exists within ClientRequestContext::sslBumpAccessCheck(). A crafted request can trigger the dereference of a null pointer. An attacker can leverage this vulnerability to create a denial-of-service condition to users of the system. Was ZDI-CAN-6088."},{"lang":"es","value":"Esta vulnerabilidad permite que atacantes remotos denieguen el servicio de instalaciones vulnerables de The Squid Software Foundation Squid 3.5.27-20180318. No se requiere autenticación para explotar esta vulnerabilidad. Este error en concreto existe en ClientRequestContext::sslBumpAccessCheck(). Una petición manipulada puede desencadenar la desreferencia de un puntero NULL. Un atacante puede aprovechar esta vulnerabilidad para crear una condición de denegación de servicio (DoS) a los usuarios del sistema. Anteriormente era ZDI-CAN-6088."}],"id":"CVE-2018-1172","lastModified":"2026-06-17T01:50:38.257","metrics":{"cvssMetricV2":[{"acInsufInfo":false,"baseSeverity":"MEDIUM","cvssData":{"accessComplexity":"MEDIUM","accessVector":"NETWORK","authentication":"NONE","availabilityImpact":"PARTIAL","baseScore":4.3,"confidentialityImpact":"NONE","integrityImpact":"NONE","vectorString":"AV:N/AC:M/Au:N/C:N/I:N/A:P","version":"2.0"},"exploitabilityScore":8.6,"impactScore":2.9,"obtainAllPrivilege":false,"obtainOtherPrivilege":false,"obtainUserPrivilege":false,"source":"nvd@nist.gov","type":"Primary","userInteractionRequired":false}],"cvssMetricV30":[{"cvssData":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.0"},"exploitabilityScore":2.2,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2018-05-16T21:29:00.280","references":[{"source":"zdi-disclosures@trendmicro.com","tags":["Vendor Advisory"],"url":"http://www.squid-cache.org/Advisories/SQUID-2018_3.txt"},{"source":"zdi-disclosures@trendmicro.com","tags":["Third Party Advisory","VDB Entry"],"url":"https://zerodayinitiative.com/advisories/ZDI-18-309"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Vendor Advisory"],"url":"http://www.squid-cache.org/Advisories/SQUID-2018_3.txt"},{"source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Third Party Advisory","VDB Entry"],"url":"https://zerodayinitiative.com/advisories/ZDI-18-309"}],"sourceIdentifier":"zdi-disclosures@trendmicro.com","vulnStatus":"Modified","weaknesses":[{"description":[{"lang":"en","value":"CWE-476"}],"source":"zdi-disclosures@trendmicro.com","type":"Secondary"},{"description":[{"lang":"en","value":"CWE-476"}],"source":"nvd@nist.gov","type":"Primary"}]}