CVE-2025-4068 is a stack-based buffer overflow vulnerability identified in version 1.0 of the code-projects Simple Movie Ticket Booking System, specifically within the function named 'changeprize'. This vulnerability arises from improper handling of the 'prize' argument, which can be manipulated to overflow the stack buffer. Such a buffer overflow can lead to memory corruption, potentially allowing an attacker to execute arbitrary code or cause a denial of service by crashing the application. The vulnerability requires local access with low privileges (PR:L) to exploit, meaning the attacker must have some level of access to the system where the application is running. No user interaction is needed once local access is obtained, and the attack complexity is low (AC:L). The vulnerability affects confidentiality, integrity, and availability to a limited extent (VC:L, VI:L, VA:L), indicating partial impact on these security properties. The vulnerability does not require authentication (AT:N) but does require local privileges, and the scope is unchanged (S:N), meaning the impact is confined to the vulnerable component. Although the CVSS 4.0 score is 4.8 (medium severity), the underlying nature of a stack-based buffer overflow is critical in many contexts, especially if the application runs with elevated privileges or processes sensitive data. The exploit has been publicly disclosed but no known exploits are currently reported in the wild. No patches or mitigations have been linked yet. The vulnerability is relevant to organizations using this specific ticket booking system, which may be deployed in local cinema or event management environments.

For European organizations, the impact of this vulnerability depends largely on the deployment scale of the Simple Movie Ticket Booking System. If used in cinemas, theaters, or event venues, exploitation could lead to service disruption, affecting ticket sales and customer experience. The buffer overflow could allow attackers with local access to execute arbitrary code, potentially leading to unauthorized access to customer data or manipulation of ticket pricing (via the 'changeprize' function). This could result in financial loss, reputational damage, and regulatory compliance issues under GDPR if personal data is compromised. However, since exploitation requires local access and low privileges, the risk is mitigated if organizations enforce strict access controls and network segmentation. The vulnerability does not appear to allow remote exploitation, limiting its impact on large-scale remote attacks. Nonetheless, insider threats or compromised local accounts could leverage this vulnerability to escalate privileges or disrupt services.

1. Restrict local access to systems running the Simple Movie Ticket Booking System by enforcing strong access controls and limiting user privileges to only those necessary for operation. 2. Implement application whitelisting and process monitoring to detect anomalous behavior indicative of exploitation attempts. 3. Employ memory protection mechanisms such as stack canaries, DEP (Data Execution Prevention), and ASLR (Address Space Layout Randomization) at the OS level to mitigate buffer overflow exploitation. 4. Conduct code review and static analysis on the 'changeprize' function to identify and fix the buffer overflow vulnerability; if vendor patches are unavailable, consider applying custom patches or recompiling with secure coding practices. 5. Isolate the ticket booking system on dedicated network segments to reduce the risk of lateral movement by attackers with local access. 6. Monitor logs for unusual activity related to local privilege escalations or crashes in the booking system. 7. Educate staff about the risks of local exploitation and enforce strict endpoint security policies to prevent unauthorized access.