As noted in the “VTPM.md” file in the eve documentation, “VTPM is a server listening on port
8877 in EVE, exposing limited functionality of the TPM to the clients.
VTPM allows clients to
execute tpm2-tools binaries from a list of hardcoded options”
The communication with this server is done using protobuf, and the data is comprised of 2
parts:
1. Header
2. Data
When a connection is made, the server is waiting for 4 bytes of data, which will be the header,
and these 4 bytes would be parsed as uint32 size of the actual data to come.
Then, in the function “handleRequest” this size is then used in order to allocate a payload on
the stack for the incoming data.
As this payload is allocated on the stack, this will allow overflowing the stack size allocated for
the relevant process with freely controlled data.
* An attacker can crash the system.
* An attacker can gain control over the system, specifically on the “vtpm_server” process
which has very high privileges.
References
| Link | Resource |
|---|---|
| https://asrg.io/security-advisories/cve-2023-43632/ |
Configurations
History
28 Sep 2023, 06:15
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
|
25 Sep 2023, 16:07
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linuxfoundation edge Virtualization Engine
Linuxfoundation |
|
| CPE | cpe:2.3:o:linuxfoundation:edge_virtualization_engine:*:*:*:*:*:*:*:* | |
| References | (MISC) https://asrg.io/security-advisories/freely-allocate-buffer-on-the-stack-with-data-from-socket/ - Third Party Advisory | |
| CWE | CWE-770 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 9.9 |
21 Sep 2023, 14:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2023-09-21 14:15
Updated : 2023-12-10 15:14
NVD link : CVE-2023-43632
Mitre link : CVE-2023-43632
CVE.ORG link : CVE-2023-43632
JSON object : View
Products Affected
linuxfoundation
- edge_virtualization_engine