CVE-2021-31878

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:digium:asterisk:16.17.0:*:*:*:*:*:*:*", "matchCriteriaId": "4793E23F-97F7-4F87-B521-1718AA6FAD06", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:16.18.0:*:*:*:*:*:*:*", "matchCriteriaId": "E01BD9F9-857A-4114-80D6-9F43B230EF3D", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:16.19.0:*:*:*:*:*:*:*", "matchCriteriaId": "00B876D8-5BE7-4F40-9692-4C7C6EE49611", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:18.3.0:*:*:*:*:*:*:*", "matchCriteriaId": "78681A97-2B41-494E-AA7A-3BB953E8497B", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:18.4.0:*:*:*:*:*:*:*", "matchCriteriaId": "54266F33-D604-491F-9891-C9D8A1B68135", "vulnerable": true}, {"criteria": "cpe:2.3:a:digium:asterisk:18.5.0:*:*:*:*:*:*:*", "matchCriteriaId": "F4CC9EFF-8916-46E6-97ED-39035541E350", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request."}, {"lang": "es", "value": "Se ha detectado un problema en PJSIP en Asterisk versiones anteriores a 16.19.1 y versiones anteriores a 18.5.1. Para explotarlo, se debe recibir un re-INVITE sin SDP despu\u00e9s de que Asterisk haya enviado una petici\u00f3n BYE"}], "id": "CVE-2021-31878", "lastModified": "2026-06-17T03:52:23.840", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-30T14:15:16.690", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "http://downloads.asterisk.org/pub/security/AST-2021-007.html"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2021/Jul/48"}, {"source": "cve@mitre.org", "tags": ["Patch", "Vendor Advisory"], "url": "https://downloads.digium.com/pub/security/AST-2021-007.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://issues.asterisk.org/jira/browse/ASTERISK-29381"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://downloads.asterisk.org/pub/security/AST-2021-007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/163638/Asterisk-Project-Security-Advisory-AST-2021-007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2021/Jul/48"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://downloads.digium.com/pub/security/AST-2021-007.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://issues.asterisk.org/jira/browse/ASTERISK-29381"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-617"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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