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🛡️ CVE-2023-43632 — edge-virtualization-engine

🔴 CVSS 9.0 — Critical ✅ No Known Exploit CWE-789 NVD
9.0
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2023-43632 is classified as CWE-789: Memory Allocation with Excessive Size Value. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.

Affected software

CVE-2023-43632 is recorded against 2 packages.

  • edge-virtualization-engine (from 3.0.0 up to 9.5.0)
  • github.com/lf-edge/eve

Timeline and source

Published on 21 September 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

asrg.io
asrg.io

Details

Severity CRITICAL
CVSS Score 9.0
CVSS Vector CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE CWE-789
Public Exploit ✅ No
Source NVD
Published 2023-09-21
Updated 2026-08-20
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
edge-virtualization-engine 3.0.0 9.5.0
github.com/lf-edge/eve — —

Similar Threats

Exploit Protection

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.