wibu-codemeter-analysis

WIBU CodeMeter DLL 的密码学分析 关于 WIBU-Systems CodeMeter 保护的独立安全研究 负责任披露 厂商通知时间： 2025年12月24日 披露期限： 90天 公开发布： 2026年3月24日 范围： 仅分析 WibuBz32.dll 摘要 对 WIBU CodeMeter 运行时库的分析揭示了自定义 PE 节区中与 AES-256 加密不一致的特征。 主要发现： 指标| 预期（AES-256）| 观察值| 偏差 ---|---|---|--- 香农熵| ≥7.9 比特/字节| 5.24-6.48| 低 19-34% 模式重复| 极少| 20,000+...

CVE-2026-81574

In CodeMeter Runtime before versions 8.41a and 9.10, the logger does not sanitize input strings in certain cases, allowing an attacker to inject printf-style format specifiers. This can be used to reliably crash CodeMeter and disclose sensitive information such as process memory and stack canarie...

CVE-2026-81575

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 accepts requests with opcode 0x5e, which contain the data length and the data itself. Missing bounds checking on the data length value can lead to out of bounds reads, causing a segmentation fault that ultimately crashes...

CVE-2026-81576

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read license information belonging to anoth...

CVE-2026-81573

If CodeMeter Runtime before 8.41a or 9.10 is configured as a server, the configuration command handler does not enforce network- origin restrictions. Commands intended only for local or same-network clients can therefore be executed by arbitrary remote peers. An attacker can read potentially...

CVE-2026-81572

In CodeMeter Runtime from version 8.40 to excluding 8.41a and 9.00 to excluding 9.10, cmu.exe --create-io --file C: creates a predictable temporary file under C:\CM-Stick. The directory and file paths are not properly checked for NTFS reparse points, such as junctions or symbolic links, before fi...

CVE-2026-81576 Improper Authentication of Session Handles

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read license information belonging to anoth...

EUVD-2026-66983

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read license information belonging to anoth...

CVE-2026-81576 Improper Authentication of Session Handles

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 issues handles per connection and relies on a cryptographically weak SID as sole authenticator. An attacker can brute-force the SID, recover another session's handle number, and read license information belonging to anoth...

CVE-2026-81576

CodeMeter Runtime (WIBU), when configured as a server in versions before 8.41a and 9.10 , issues a per-connection session handle and relies on a cryptographically weak SID as the sole authenticator. An attacker with network access can brute-force the SID , recover another session's handle number,...

EUVD-2026-66982

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 accepts requests with opcode 0x5e, which contain the data length and the data itself. Missing bounds checking on the data length value can lead to out of bounds reads, causing a segmentation fault that ultimately crashes...

CVE-2026-81575 Missing Sanity Checks for Buffer Lengths

If configured as a server, CodeMeter Runtime before versions 8.41a and 9.10 accepts requests with opcode 0x5e, which contain the data length and the data itself. Missing bounds checking on the data length value can lead to out of bounds reads, causing a segmentation fault that ultimately crashes...

CVE-2026-81575

CodeMeter Runtime (WIBU) prior to versions 8.41a and 9.10 is vulnerable when configured as a server. Requests carrying opcode 0x5e include a data-length field that lacks bounds checking, allowing an attacker to trigger out-of-bounds reads that result in a segmentation fault and crash the Runtime....

CVE-2026-81574 Format String Vulnerability in Logger

In CodeMeter Runtime before versions 8.41a and 9.10, the logger does not sanitize input strings in certain cases, allowing an attacker to inject printf-style format specifiers. This can be used to reliably crash CodeMeter and disclose sensitive information such as process memory and stack canarie...

EUVD-2026-66981

In CodeMeter Runtime before versions 8.41a and 9.10, the logger does not sanitize input strings in certain cases, allowing an attacker to inject printf-style format specifiers. This can be used to reliably crash CodeMeter and disclose sensitive information such as process memory and stack canarie...

CVE-2026-81574

CodeMeter Runtime versions prior to 8.41a and 9.10 are affected by a format string vulnerability in the logger component, which fails to sanitize input strings in certain cases, allowing injection of printf-style format specifiers . An attacker can reliably crash CodeMeter and disclose sensitive ...

CVE-2026-81573 Improper Access Control in Local-Only Configuration Commands

If CodeMeter Runtime before 8.41a or 9.10 is configured as a server, the configuration command handler does not enforce network- origin restrictions. Commands intended only for local or same-network clients can therefore be executed by arbitrary remote peers. An attacker can read potentially...

CVE-2026-81573

CodeMeter Runtime versions before 8.41a or 9.10 are affected when configured as a server. The configuration command handler fails to enforce network-origin restrictions, allowing arbitrary remote peers to execute commands intended only for local or same-network clients. This enables reading sensi...

EUVD-2026-66980

If CodeMeter Runtime before 8.41a or 9.10 is configured as a server, the configuration command handler does not enforce network- origin restrictions. Commands intended only for local or same-network clients can therefore be executed by arbitrary remote peers. An attacker can read potentially...

CVE-2026-81572

CodeMeter Runtime (WibuSystems) on Windows is vulnerable to a local privilege escalation via a predictable temporary file. The cmu.exe executable, when invoked with --create-io --file C:, creates a temporary file under C:\CM-Stick without checking the directory and file paths for NTFS reparse poi...