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GHSA-pq4w-qm9g-qx68
No affected components available
Impact
Credential replay affecting those connected to a server when all 3 of the following conditions are met:
SecurityPolicyisNone- using username/password or X509-based authentication
- the server has a defect causing it to send null/empty or zeroed nonces
Patches
The problem has been patched in version 0.3.6. A more relaxed treatment of validation as agreed upon by the OPC UA Security Working Group is implemented in version 0.3.7.
Workarounds
Do not use username/password or X509-based authentication with SecurityPolicy of None.
References
https://opcfoundation.org/SecurityBulletins/OPC%20Foundation%20Security%20Bulletin%20CVE-2019-19135.pdf
For more information
If you have any questions or comments about this advisory:
- Open an issue at https://github.com/eclipse/milo/issues
- Email the mailing list
The vulnerability can be exploited over the network without needing physical access. It is difficult for an attacker to exploit this vulnerability and may require special conditions. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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