CVE-2023-24011

Public Exploit
Data Distribution Service (DDS) Chain of Trust (CoT) violation vulnerability in Cyclone DDS

Description

An attacker can arbitrarily craft malicious DDS Participants (or ROS 2 Nodes) with valid certificates to compromise and get full control of the attacked secure DDS databus system by exploiting vulnerable attributes in the configuration of PKCS#7 certificate’s validation. This is caused by a non-compliant implementation of permission document verification used by some DDS vendors. Specifically, an improper use of the OpenSSL PKCS7_verify function used to validate S/MIME signatures.

Remediation

Solution:

  • Instead of including the Permission CA into the store of trusted certificates to use for chain verification, the Permission CA (and only the Permission CA) should be included in the set of certificates in which to search for signer's certificates. The store of trusted certificates to use for chain verification should then also be set to null. 2) With the store of trusted certificates to use for chain verification set to null, the PKCS7_NOVERIFY flag should then be enabled so any signer's certificates (i.e. only the Permission CA) is not chain verified. 3) Given that only a valid signer's certificate must be the Permission CA, the PKCS7_NOINTERN flag should then be enabled so any set of certificates in the message itself are not searched when locating the signer's certificates.

Category

8.2
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.06%
Affected: ZettaScale DDS
Published at:
Updated at:

References

Link Tags
https://github.com/ros2/sros2/issues/282
https://gist.github.com/vmayoral/235c02d0b0ef85a29812eff6980ff80d

Frequently Asked Questions

What is the severity of CVE-2023-24011?
CVE-2023-24011 has been scored as a high severity vulnerability.
How to fix CVE-2023-24011?
To fix CVE-2023-24011: Instead of including the Permission CA into the store of trusted certificates to use for chain verification, the Permission CA (and only the Permission CA) should be included in the set of certificates in which to search for signer's certificates. The store of trusted certificates to use for chain verification should then also be set to null. 2) With the store of trusted certificates to use for chain verification set to null, the PKCS7_NOVERIFY flag should then be enabled so any signer's certificates (i.e. only the Permission CA) is not chain verified. 3) Given that only a valid signer's certificate must be the Permission CA, the PKCS7_NOINTERN flag should then be enabled so any set of certificates in the message itself are not searched when locating the signer's certificates.
Is CVE-2023-24011 being actively exploited in the wild?
It is possible that CVE-2023-24011 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-24011?
CVE-2023-24011 affects ZettaScale DDS.
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