{"id":"CVE-2012-1515","aliases":["EUVD-2012-1533","GHSA-8758-2jw5-f6gw"],"status":"published","title":"VMware ESXi 3.5, 4.0, and 4.1 and ESX 3.5, 4.0, and 4.1 do not properly implement port-based I/O...","description":"VMware ESXi 3.5, 4.0, and 4.1 and ESX 3.5, 4.0, and 4.1 do not properly implement port-based I/O operations, which allows guest OS users to gain guest OS privileges by overwriting memory locations in a read-only memory block associated with the Virtual DOS Machine.","severity":{"version":"2.0","score":8.3,"vector":"AV:A/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.00814,"percentile":0.57273,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-264"],"published":"2012-04-02T10:00:00Z","modified":"2026-06-16T23:39:39Z","products":[{"vendor":"vmware","product":"esx"},{"vendor":"vmware","product":"esxi"}],"references":[{"url":"http://www.us-cert.gov/cas/techalerts/TA12-164A.html","tags":["third-party-advisory","x_refsource_CERT","x_transferred","US Government Resource"]},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2012/ms12-042","tags":["vendor-advisory","x_refsource_MS","x_transferred"]},{"url":"http://www.securityfocus.com/bid/52820","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17110","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://www.vmware.com/security/advisories/VMSA-2012-0006.html","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A15209","tags":["vdb-entry","signature","x_refsource_OVAL","x_transferred"]},{"url":"http://www.securitytracker.com/id?1026875","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/74480","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-1515"},{"url":"https://github.com/advisories/GHSA-8758-2jw5-f6gw"}],"sources":{"cve":[{"id":"CVE-2012-1515","description":"VMware ESXi 3.5, 4.0, and 4.1 and ESX 3.5, 4.0, and 4.1 do not properly implement port-based I/O operations, which allows guest OS users to gain guest OS privileges by overwriting memory locations in a read-only memory block associated with the Virtual DOS Machine.","status":"published","published":"2012-04-02T10:00:00Z","modified":"2024-08-06T19:01:02.772Z","updated_at":"2026-11-02T14:34:52.27879Z"}],"euvd":[{"id":"EUVD-2012-1533","description":"VMware ESXi 3.5, 4.0, and 4.1 and ESX 3.5, 4.0, and 4.1 do not properly implement port-based I/O operations, which allows guest OS users to gain guest OS privileges by overwriting memory locations in a read-only memory block associated with the Virtual DOS Machine.","status":"published","published":"2012-04-02T10:00:00Z","modified":"2024-08-06T19:01:02Z","updated_at":"2026-11-03T01:56:17.940678Z"}],"ghsa":[{"id":"GHSA-8758-2jw5-f6gw","title":"VMware ESXi 3.5, 4.0, and 4.1 and ESX 3.5, 4.0, and 4.1 do not properly implement port-based I/O...","description":"VMware ESXi 3.5, 4.0, and 4.1 and ESX 3.5, 4.0, and 4.1 do not properly implement port-based I/O operations, which allows guest OS users to gain guest OS privileges by overwriting memory locations in a read-only memory block associated with the Virtual DOS Machine.","status":"published","published":"2022-05-14T02:35:30Z","modified":"2023-02-02T05:06:09Z","updated_at":"2026-11-02T14:52:15.07961Z"}],"nvd":[{"id":"CVE-2012-1515","description":"VMware ESXi 3.5, 4.0, and 4.1 and ESX 3.5, 4.0, and 4.1 do not properly implement port-based I/O operations, which allows guest OS users to gain guest OS privileges by overwriting memory locations in a read-only memory block associated with the Virtual DOS Machine.","status":"published","published":"2012-04-02T10:46:44.373Z","modified":"2026-06-16T23:39:39.707Z","cvss":[{"version":"2.0","score":8.3,"vector":"AV:A/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-264"],"updated_at":"2026-11-02T14:02:13.901526Z"}]}}