Microsoft OpenSSH for Windows Remote Code Execution Vulnerability
Released: Oct 8, 2024
- Assigning CNA
- Microsoft
- CVE.org link
- CVE-2024-38029
- Impact
- Remote Code Execution
- Max Severity
- Important
- Weakness
- CVSS Source
- Microsoft
- Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
- Metrics
- CVSS:3.1 7.5 / 6.5Base score metrics: 7.5 / Temporal score metrics: 6.5
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Exploit Code Maturity
Unproven
Remediation Level
Official Fix
Report Confidence
Confirmed
Please see Common Vulnerability Scoring System for more information on the definition of these metrics.
Exploitability
The following table provides an exploitability assessment for this vulnerability at the time of original publication.
- Publicly disclosed
- No
- Exploited
- No
- Exploitability assessment
- Exploitation Less Likely
FAQ
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires multiple conditions to be met, such as specific application behavior, user actions, manipulation of parameters passed to a function, and impersonation of an integrity level token.
According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
Exploitation of this vulnerability requires a user to remote into a server that is controlled by an attacker, which could then allow the server to execute a command on the user's machine without their consent. This scenario assumes that the user has the ability to remote into the server and that the server has been compromised to execute such commands upon connection.
How could an attacker exploit this vulnerability?
An attacker could remotely load a malicious DLL onto a machine where the ssh-agent service is launched with the -Oallow-remote-pkcs11 option, which could lead to remote code execution.
This vulnerability arises because the ssh-pkcs11-helper.exe is configured to allow remote DLL loading, which is not intended for arbitrary remote libraries but rather for pkcs providers already present on the remote machine.
According to the CVSS metric, the attack vector is network (AV:N) and the user interaction is required (UI:R). What is the target context of the remote code execution?
This attack requires a client to connect to a malicious server, and that could allow the attacker to gain code execution on the client.
Acknowledgements
- DarkNavy
Security Updates
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle.
- 10.0.25398.1189
Disclaimer
Revisions
Information published.