CVE-2023-34758
HighCVSS 8.1Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
Sliver from versions 1.5.x to 1.5.39 has an improper cryptographic implementation, allowing attackers to execute a man-in-the-middle attack via intercepted and crafted responses.
Risk Assessment
The organization may be exposed to data interception and communication manipulation, leading to loss of confidentiality and integrity of information.
Recommendation
It is recommended to update Sliver to the latest version to mitigate this vulnerability and implement additional measures to secure communication.
Other vulnerabilities in Sliver
See all- CVE-2026-34227High
Sliver before version 1.7.4 has a vulnerability where a single click on a malicious link gives an unauthenticated attacker immediate control over all active C2 sessions and beacons via the operator's browser, enabling data exfiltration or infrastructure destruction.
- CVE-2025-27093Medium
Sliver is a command and control framework that uses a custom Wireguard netstack. In versions 1.5.43 and earlier, and in development version 1.6.0-dev, the netstack does not limit traffic between Wireguard clients. This allows clients to communicate with each other unrestrictedly, potentially enabling leaked or recovered keypairs to be used to attack operators or allowing port forwardings to be accessible from other implants.
Original NVD description (English source)
Sliver from v1.5.x to v1.5.39 has an improper cryptographic implementation, which allows attackers to execute a man-in-the-middle attack via intercepted and crafted responses.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS