Is CVE-2023-43632 actively exploited?

No active exploitation of CVE-2023-43632 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-43632 be exploited remotely?

Yes. CVE-2023-43632 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-43632?

CVE-2023-43632 has a CVSS score of 9.9 (CRITICAL).

HOME VULNERABILITIESCVE-2023-43632

CRITICAL

CVE-2023-43632

CWE-789Published: September 21, 2023· Updated: Jun 17, 2026

9.9

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2023-43632 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.9.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.