{"schema":"threatline.record/2","record":{"id":"CVE-2023-34048","aliases":[],"summary":"VMware vCenter Server Out-of-Bounds Write Vulnerability","details":"VMware vCenter Server contains an out-of-bounds write vulnerability in the implementation of the DCERPC protocol that allows an attacker to conduct remote code execution.","categories":["Containers & cloud"],"product":"vCenter Server","vendor":"VMware","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-34048","source_modified_at":"2025-10-21T23:05:33.739Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"VMware vCenter Server","vendor":"VMware","versions":[{"lessThan":"8.0U2","status":"affected","version":"8.0","versionType":"8.0U2"},{"lessThan":"7.0U3o","status":"affected","version":"7.0","versionType":"7.0U3o"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-34048","source_modified_at":"2025-10-21T23:05:33.739Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"VMware Cloud Foundation (VMware vCenter Server)","vendor":"VMware","versions":[{"status":"affected","version":"5.x"},{"status":"affected","version":"4.x"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-34048","source_modified_at":"2025-10-21T23:05:33.739Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"VMware vCenter Server","ecosystem":null},"version":"8.0U2","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2023-34048","source_modified_at":"2025-10-21T23:05:33.739Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"VMware vCenter Server","ecosystem":null},"version":"7.0U3o","basis":"first unaffected version stated in the CVE record"}],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2024-01-22","due_date":"2024-02-12","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.99428,"percentile":0.99944,"score_date":"2026-10-23"},"published_at":"2023-10-25T04:21:42.267Z","modified_at":"2025-10-21T23:05:33.739Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2023-34048","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:05:33.739Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-34048.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2023-34048","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"source":"CVE List","url":"https://www.vmware.com/security/advisories/VMSA-2023-0023.html","tags":["x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-34048","source":"CISA KEV"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-34048","tags":["government-resource"]},{"source":"CVE List","url":"https://www.vicarius.io/vsociety/posts/understanding-cve-2023-34048-a-zero-day-out-of-bound-write-in-vcenter-server"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2024-03-11T16:43:59.468773Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"VMware vCenter Server - Out-of-Bounds Write","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-34048.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:05:33.739Z","content_hash":"b741da6d167f61bf3acf9c3c1585c73de490a1bc0063c9d981e87e56631810b7"}}