CVE-2010-0766 in Modo
Summary
by MITRE
Integer overflow in the Swap4 function in valet4.dll in Luxology Modo 401 allows user-assisted remote attackers to execute arbitrary code via a .LXO file containing a CHNL subchunk associated with an invalid length.
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Analysis
by VulDB Data Team • 05/01/2026
The vulnerability identified as CVE-2010-0766 represents a critical integer overflow flaw within the Luxology Modo 401 software's valet4.dll library. This issue specifically affects the Swap4 function which processes .LXO files containing CHNL subchunks with invalid length parameters. The vulnerability falls under CWE-190, which categorizes integer overflow conditions that can lead to arbitrary code execution. The flaw demonstrates how improper input validation in multimedia file parsing can create dangerous execution paths for malicious actors.
The technical implementation of this vulnerability occurs when the Swap4 function attempts to process a CHNL subchunk within an LXO file without adequate bounds checking on the length parameter. When an attacker crafts a malicious .LXO file with an invalid length value that exceeds the maximum integer capacity, the function performs an integer overflow operation. This overflow corrupts memory structures and can potentially overwrite critical program variables or return addresses, ultimately allowing remote attackers to inject and execute arbitrary code on systems running the affected software.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise when exploited successfully. Attackers can leverage this vulnerability through user-assisted remote attacks, meaning they need minimal interaction from the victim beyond opening the malicious file. This makes the vulnerability particularly dangerous in environments where users frequently open third-party design files or when the software is used in collaborative workflows. The attack vector is consistent with ATT&CK technique T1203, which involves the exploitation of software vulnerabilities to gain system access through file-based attacks.
Systems utilizing Luxology Modo 401 version 401 are particularly susceptible to this vulnerability, though the impact may vary depending on the operating environment and security configurations. The integer overflow affects memory management within the application's parsing routines, creating potential for privilege escalation and persistent access to compromised systems. Security researchers have documented similar patterns in multimedia processing libraries where insufficient input validation leads to memory corruption vulnerabilities that can be exploited for privilege escalation attacks.
The recommended mitigation strategies include immediate software updates from Luxology to address the integer overflow in valet4.dll, along with implementing strict file validation policies for LXO files in enterprise environments. Organizations should also consider network-based intrusion detection systems to monitor for suspicious file handling patterns and implement application whitelisting to prevent unauthorized software execution. Additionally, users should be educated about the risks of opening untrusted design files and the importance of keeping software updated with the latest security patches. The vulnerability demonstrates the critical importance of proper integer handling in security-sensitive applications and aligns with industry best practices outlined in OWASP Top Ten and NIST cybersecurity guidelines for preventing memory corruption vulnerabilities.