CVE-2024-41111 in sliver
Summary
by MITRE • 07/19/2024
Sliver is an open source cross-platform adversary emulation/red team framework, it can be used by organizations of all sizes to perform security testing. Sliver version 1.6.0 (prerelease) is vulnerable to RCE on the teamserver by a low-privileged "operator" user. The RCE is as the system root user. The exploit is pretty fun as we make the Sliver server pwn itself. As described in a past issue (#65), "there is a clear security boundary between the operator and server, an operator should not inherently be able to run commands or code on the server." An operator who exploited this vulnerability would be able to view all console logs, kick all other operators, view and modify files stored on the server, and ultimately delete the server. This issue has not yet be addressed but is expected to be resolved before the full release of version 1.6.0. Users of the 1.6.0 prerelease should avoid using Silver in production.
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Analysis
by VulDB Data Team • 07/19/2024
The vulnerability described in CVE-2024-41111 represents a critical privilege escalation flaw within the Sliver framework, an open-source cross-platform adversary emulation and red team tool designed for security testing across organizations of all sizes. This issue specifically affects Sliver version 1.6.0 prerelease, where a low-privileged "operator" user can achieve remote code execution with system root privileges on the teamserver. The vulnerability fundamentally undermines the security architecture that should maintain clear separation between operator and server privileges, creating a scenario where unauthorized access can lead to complete system compromise. The technical nature of this flaw allows an attacker to essentially exploit the Sliver server to pwn itself, demonstrating the severity of the privilege escalation mechanism that has been improperly implemented.
The operational impact of this vulnerability extends far beyond simple code execution, as it provides the compromised operator with complete administrative control over the teamserver infrastructure. This includes the ability to view all console logs, which could expose sensitive operational data and command sequences, kick all other operators to maintain persistent access, view and modify files stored on the server, and ultimately delete the entire server instance. Such comprehensive access represents a complete breakdown of the security boundaries that should protect the teamserver from unauthorized modification or destruction. The vulnerability's exploitation capability directly contradicts the fundamental security principle that operators should not inherently possess the ability to execute commands or code on the server itself, as noted in the referenced issue #65.
From a cybersecurity perspective, this vulnerability aligns with CWE-269: "Improper Privilege Management" and represents a classic case of privilege escalation that could enable attackers to achieve system-level compromise. The ATT&CK framework would categorize this under T1078: Valid Accounts for maintaining persistence and T1566: Phishing for initial access, though the specific vector here involves leveraging a legitimate operator account to escalate privileges. The fact that this vulnerability exists in a prerelease version indicates a critical oversight in the security testing and code review process, as such privilege escalation flaws should be identified and resolved before production releases. Organizations using the 1.6.0 prerelease version face significant risk of complete system compromise, making this vulnerability particularly concerning for security teams relying on the framework for legitimate adversary emulation activities. The remediation approach should focus on implementing proper privilege boundaries and access controls between operator and server components to prevent unauthorized code execution at the system level.