CVE-2013-4978 in Aloaha PDF Suite FREE
Summary
by MITRE
Stack-based buffer overflow in AloahaPDFViewer 5.0.0.7 and earlier in Aloaha PDF Suite FREE allows remote attackers to execute arbitrary code via a crafted PDF file.
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Analysis
by VulDB Data Team • 06/15/2025
The vulnerability identified as CVE-2013-4978 represents a critical stack-based buffer overflow flaw within the AloahaPDFViewer component of the Aloaha PDF Suite FREE version 5.0.0.7 and earlier. This security weakness resides in the PDF parsing functionality that processes document structures and content, creating an exploitable condition where malicious input can overwrite adjacent memory locations on the program's stack. The flaw specifically affects the viewer's handling of malformed PDF files, where an attacker can craft a specially designed document that triggers the buffer overflow during parsing operations.
The technical implementation of this vulnerability stems from inadequate bounds checking within the PDF viewer's memory management routines. When processing certain PDF elements such as embedded objects, fonts, or complex graphical structures, the application fails to validate the size of incoming data against allocated buffer space. This oversight creates a scenario where a crafted PDF file can exceed the predetermined buffer limits, causing adjacent memory locations to be overwritten with attacker-controlled data. The stack-based nature of the overflow means that the return addresses and local variables stored on the program stack are compromised, potentially allowing an attacker to redirect execution flow to malicious code.
The operational impact of this vulnerability extends beyond simple code execution, as it provides remote attackers with a pathway to gain unauthorized control over systems running vulnerable versions of the Aloaha PDF Suite. Attackers can exploit this flaw by delivering a malicious PDF file through various vectors including email attachments, web downloads, or compromised websites. Once executed, the overflow enables arbitrary code execution with the privileges of the user running the vulnerable application, potentially leading to complete system compromise. This vulnerability particularly affects environments where users frequently open PDF documents from untrusted sources, making it a significant threat in enterprise and personal computing scenarios.
Mitigation strategies for CVE-2013-4978 should prioritize immediate patching of affected systems, as the vulnerability has been addressed through updates to the Aloaha PDF Suite. Organizations should implement comprehensive network security measures including email filtering, web proxy scanning, and endpoint protection solutions to prevent delivery of malicious PDF files. The vulnerability aligns with CWE-121, stack-based buffer overflow, and maps to attack techniques in the MITRE ATT&CK framework under T1203, Exploitation for Client Execution, and T1059, Command and Scripting Interpreter, as attackers can leverage this flaw to execute arbitrary commands on target systems. System administrators should also consider implementing application whitelisting policies and restricting user permissions to minimize potential damage from successful exploitation attempts.