CVE-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 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.

CVSS v3 9.0 CRITICAL

9.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector ADJACENT_NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://asrg.io/security-advisories/cve-2023-43632/
https://asrg.io/security-advisories/cve-2023-43632/

Configurations

Configuration 1 (hide)

cpe:2.3:o:linuxfoundation:edge_virtualization_engine:*:*:*:*:*:*:*:*

History

21 Nov 2024, 08:24

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-09-21 14:15

Updated : 2024-11-21 08:24

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

CWE

CWE-789

Memory Allocation with Excessive Size Value

CWE-770

Allocation of Resources Without Limits or Throttling

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