CVE-2023-24291 in Portable Puzzle Collection
Summary
by MITRE • 09/14/2026
Portable Puzzle Collection before 20230116.5782e29 was discovered to contain a buffer overflow via the record length parameter.
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Analysis
by VulDB Data Team • 09/14/2026
The vulnerability identified in Portable Puzzle Collection prior to version 20230116.5782e29 represents a critical memory safety issue rooted in improper validation of input data, specifically concerning the record length parameter. This flaw is classified under Common Weakness Enumeration as CWE-120, Buffer Copy without Checking Size of Input, which indicates that the application fails to ensure that the size of an input buffer matches the allocated space for it. In the context of this software, the record length parameter likely dictates how much data is read from a file or stream into a fixed-size memory buffer. When a crafted input specifies a record length exceeding the bounds of the destination buffer, the application proceeds to copy the excess data without performing adequate boundary checks. This behavior allows an attacker to overwrite adjacent memory locations on the stack or heap, leading to unpredictable program state and potential control flow hijacking.
From an operational perspective, this vulnerability poses significant risks ranging from denial of service to arbitrary code execution. If exploited successfully through a buffer overflow attack, the immediate consequence is often application crash due to segmentation faults caused by writing to protected memory regions. However, in more sophisticated scenarios where stack canaries or address space layout randomization are bypassed, an attacker could leverage this flaw to inject and execute malicious shellcode. This would grant them unauthorized access to the system running Portable Puzzle Collection, potentially leading to data exfiltration, installation of persistent backdoors, or use of the compromised machine as a pivot point for further network attacks. The severity is heightened by the fact that puzzle files are often shared among users, increasing the attack surface if maliciously crafted puzzles are distributed via email or file-sharing platforms.
The technical mechanism behind this exploit relies on the lack of rigorous input sanitization within the parsing logic responsible for handling record lengths. Instead of verifying whether the specified length is less than or equal to the maximum allowable size defined by the buffer allocation, the software directly utilizes the value from the parameter in memory copy operations such as memcpy or strcpy equivalents. This oversight aligns with ATT&CK technique T1203, Exploitation for Client Execution, where attackers use vulnerable applications like document viewers or media players to deliver payloads that execute upon opening a malicious file. The absence of bounds checking is a fundamental design flaw that violates secure coding principles mandated by standards such as OWASP and MISRA C, which emphasize the necessity of validating all external inputs before processing them in memory-critical functions.
Mitigation strategies for this vulnerability primarily involve updating to version 20230116.5782e29 or later, where developers have presumably implemented proper bounds checking routines. For environments unable to update immediately, defensive measures include restricting the execution of untrusted scripts and disabling macro functionality if applicable, although these are less effective for native binary vulnerabilities than they are for script-based threats. Additionally, deploying application whitelisting solutions can prevent unauthorized versions of the software from executing, thereby reducing exposure. System administrators should also ensure that operating system-level protections such as Data Execution Prevention (DEP) and Address Space Layout Randomization (ASLR) are enabled to mitigate the impact of any successful exploitation attempts by making it harder for attackers to predict memory addresses required for code execution.