Description

There is an out-of-bounds write vulnerability in DASYLab due to improper validation of user-supplied data, resulting in a write past the end of an allocated data structure. Successful exploitation requires an attacker to get a user to open a specially crafted .DSB file.  This issue affects all versions before 2026.0.0.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-09-03T22:18:10.073Z",
  "pubdate": "2026-09-03T22:18:10.073Z",
  "executiveSummary": "DASYLab contains an out-of-bounds (OOB) write vulnerability stemming from inadequate validation of user-supplied data during the parsing of .DSB files.\nThe vulnerability allows for memory corruption when an attacker induces a user to open a specially crafted malicious file, potentially leading to arbitrary code execution or application crashes.\nThis issue affects all versions of DASYLab prior to 2026.0.0.\nThe risk to the organization is high, as successful exploitation facilitates remote code execution within the context of the user running the application.\nThe attack vector is client-side, requiring social engineering to convince a target user to interact with a weaponized file.\nNo authentication is required to trigger the vulnerability, provided the file is successfully loaded by the application.",
  "technicalDetails": "The vulnerability is identified as an out-of-bounds write occurring within the file parsing routines of the DASYLab application. This memory corruption flaw manifests when the software fails to perform sufficient boundary checks on metadata or data fields contained within a .DSB file format.\nRoot Cause: The root cause is improper sanitization of user-supplied input. When the application attempts to deserialize or process a .DSB file, it allocates a buffer for internal data structures. If the file contains malformed data or oversized fields, the parsing function may write data beyond the allocated buffer boundaries. This overwrite corrupts adjacent memory regions, which may include function pointers, return addresses, or other critical process structures.\nExploitation Flow: 1. An attacker creates a malicious .DSB file containing an intentionally crafted payload designed to trigger the out-of-bounds write. 2. The attacker delivers this file to the victim through standard vectors such as email, file-sharing services, or social engineering. 3. The victim opens the malicious file within DASYLab. 4. The application triggers the vulnerable parsing routine, which performs the out-of-bounds write. 5. If the corruption is precisely engineered, the attacker can overwrite sensitive pointers to hijack control flow, leading to arbitrary code execution.\nAffected Versions: All versions of DASYLab before 2026.0.0 are vulnerable to this memory corruption issue.\nImpact: The exploitation of this vulnerability allows for memory corruption which may result in a crash (Denial of Service) or, under favorable conditions, the execution of arbitrary malicious code in the context of the current user. If the user possesses elevated privileges, the impact of the compromise is significantly increased.\nConstraint and Exposure: The vulnerability is not directly reachable via network services; rather, it is locally exploitable via client-side processing of untrusted files. There are no authentication requirements for this process, as the vulnerability is triggered during the legitimate file-opening workflow of the application.\nPost-Exploitation: Once the control flow is successfully hijacked, an attacker can execute arbitrary payloads, such as installing malware, exfiltrating sensitive data, or establishing persistent access on the host machine."
}