CVE-2023-43632
published 2023-09-21CVE-2023-43632: 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…
PriorityP260critical9.9CVSS 3.1
AVNACLPRLUINSCCHIHAH
EPSS
0.55%
41.6th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| github.com | lf-edge_eve | >= 0 < 0.0.0-20230519072751-977f42b07fa9 | 0.0.0-20230519072751-977f42b07fa9 |
| lf-edge_zededa | eve_os | >= 3.0.0 < 9.5.0 | 9.5.0 |
| linuxfoundation | edge_virtualization_engine | >= 3.0.0 < 9.5.0 | 9.5.0 |
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OSV
EVE Freely Allocates Buffer on The Stack With Data From Socket in github.com/lf-edge/eve
osv·2026-02-05
CVE-2023-43632 EVE Freely Allocates Buffer on The Stack With Data From Socket in github.com/lf-edge/eve
EVE Freely Allocates Buffer on The Stack With Data From Socket in github.com/lf-edge/eve
EVE Freely Allocates Buffer on The Stack With Data From Socket in github.com/lf-edge/eve
GHSA
EVE Freely Allocates Buffer on The Stack With Data From Socket
ghsa·2026-02-04
CVE-2023-43632 [MEDIUM] CWE-770 EVE Freely Allocates Buffer on The Stack With Data From Socket
EVE Freely Allocates Buffer on The Stack With Data From Socket
### Impact
VTPM server listens on port 8877, exposing limited TPM functionality. The server reads 4 bytes as a uint32 size header, then allocates that amount on the stack for incoming data. This allows Denial of Service attacks against the vTPM service.
An workload (a container or VM) running on EVE-OS can use this to generate a DOS against the vTPM service.
### Patches
Fixed in 9.4.3-lts and 10.1.0
### Workarounds
None
OSV
EVE Freely Allocates Buffer on The Stack With Data From Socket
osv·2026-02-04
CVE-2023-43632 [MEDIUM] EVE Freely Allocates Buffer on The Stack With Data From Socket
EVE Freely Allocates Buffer on The Stack With Data From Socket
### Impact
VTPM server listens on port 8877, exposing limited TPM functionality. The server reads 4 bytes as a uint32 size header, then allocates that amount on the stack for incoming data. This allows Denial of Service attacks against the vTPM service.
An workload (a container or VM) running on EVE-OS can use this to generate a DOS against the vTPM service.
### Patches
Fixed in 9.4.3-lts and 10.1.0
### Workarounds
None
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2023-09-21
Published