Executive Summary

Informations
Name CVE-2023-43632 First vendor Publication 2023-09-21
Vendor Cve Last vendor Modification 2024-11-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Overall CVSS Score 9.9
Base Score 9.9 Environmental Score 9.9
impact SubScore 6 Temporal Score 9.9
Exploitabality Sub Score 3.1
 
Attack Vector Network Attack Complexity Low
Privileges Required Low User Interaction None
Scope Changed Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-43632

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-770 Allocation of Resources Without Limits or Throttling

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1

Sources (Detail)

https://asrg.io/security-advisories/cve-2023-43632/
Source Url

Alert History

If you want to see full details history, please login or register.
0
1
2
3
Date Informations
2024-11-28 14:29:38
  • Multiple Updates
2023-09-28 13:27:24
  • Multiple Updates
2023-09-25 21:27:22
  • Multiple Updates
2023-09-21 21:27:18
  • First insertion