{"id":"CVE-2023-43632","details":"\nAs noted in the “VTPM.md” file in the eve documentation, “VTPM is a server listening on port\n8877 in EVE, exposing limited functionality of the TPM to the clients. \nVTPM allows clients to\nexecute tpm2-tools binaries from a list of hardcoded options”\nThe communication with this server is done using protobuf, and the data is comprised of 2\nparts:\n\n1. Header\n\n2. Data\n\nWhen a connection is made, the server is waiting for 4 bytes of data, which will be the header,\nand these 4 bytes would be parsed as uint32 size of the actual data to come.\n\nThen, in the function “handleRequest” this size is then used in order to allocate a payload on\nthe stack for the incoming data.\n\nAs this payload is allocated on the stack, this will allow overflowing the stack size allocated for\nthe relevant process with freely controlled data.\n\n* An attacker can crash the system. \n* An attacker can gain control over the system, specifically on the “vtpm_server” process\nwhich has very high privileges.\n\n\n","aliases":["GHSA-6jp5-grgh-jw42","GO-2026-4422"],"modified":"2026-03-23T05:11:20.970269Z","published":"2023-09-21T14:15:11.157Z","related":["SUSE-SU-2026:0403-1"],"references":[{"type":"ADVISORY","url":"https://asrg.io/security-advisories/cve-2023-43632/"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"3.0.0"},{"fixed":"9.5.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-43632.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"}]}