Description

A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). The device firmware contains binaries from which debugging symbols have not been removed. This could allow an unauthenticated attacker with access to the publicly available firmware update files to more easily reverse engineer the device's firmware, facilitating the identification of further vulnerabilities.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.3",
  "pubDate": "2026-09-08T09:18:17.340Z",
  "pubdate": "2026-09-08T09:18:17.340Z",
  "executiveSummary": "A security vulnerability has been identified in Reyrolle 7SR5 firmware versions prior to V2.70, where production binaries retain debug symbols.\nThis disclosure of internal metadata, including function names and variable offsets, constitutes an information exposure vulnerability.\nThe primary impact is the significant reduction in the complexity of reverse engineering efforts performed by an adversary.\nBy leveraging publicly available firmware update files, an unauthenticated attacker can reconstruct the application logic and memory map with high fidelity.\nThis exposure lowers the bar for identifying additional, more severe vulnerabilities such as buffer overflows or logic flaws, which could lead to arbitrary code execution or unauthorized device manipulation.\nThe risk is elevated due to the ease of access to firmware binaries, requiring no specific privileges or active interaction with the live device to initiate the reconnaissance phase of an attack lifecycle.",
  "technicalDetails": "The vulnerability originates from the inclusion of symbolic debugging information within the executable binary files distributed in Reyrolle 7SR5 firmware updates prior to version V2.70. In a secure build pipeline, such symbols are typically stripped to minimize binary size and, more importantly, to obscure the internal structure of the software and hinder unauthorized analysis.\nThe presence of these symbols provides an attacker with a 'map' of the firmware's internal architecture. This includes explicit naming of functions, data structures, and global variables, as well as their corresponding memory addresses. Without this metadata, an analyst would be required to perform labor-intensive manual de-obfuscation and disassembly to identify the purpose of specific code blocks or control flow paths.\nThe attack flow begins with the acquisition of the publicly accessible firmware update package. An attacker utilizes standard disassemblers and decompilers, such as IDA Pro or Ghidra, to load the binary. Because the symbol table is intact, these tools automatically map binary offsets to human-readable names. This facilitates the rapid identification of critical functions related to authentication, communication protocols, command processing, and hardware control.\nBy identifying the specific entry points and execution logic of privileged functions, an attacker can pinpoint vulnerabilities such as integer overflows, stack or heap-based buffer overflows, or authentication bypasses. The removal of the 'cognitive barrier' of reverse engineering effectively accelerates the development of a weaponized exploit.\nThe affected component is the firmware image itself, which lacks the necessary stripping of debug symbols (typically achieved via tools like 'strip' in GCC-based environments).\nThere are no authentication or privilege requirements for this phase of the attack, as the firmware is publicly distributed. The exposure is considered an offline reconnaissance vulnerability, where the attacker's activities occur externally to the target system until a vulnerability is identified and weaponized against an operational device.\nPost-exploitation, the understanding gained from the symbol-rich binary allows the attacker to craft highly specific, reliable payloads targeting the identified internal functions, thereby increasing the probability of successful exploitation during subsequent phases of an attack."
}