CVE-2013-2830 in SumatraPDF
Summary
by MITRE
Use-after-free vulnerability in SumatraPDF Reader 2.x before 2.2.1 allows remote attackers to execute arbitrary code via a crafted PDF file.
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Analysis
by VulDB Data Team • 01/03/2020
The vulnerability identified as CVE-2013-2830 represents a critical use-after-free flaw in SumatraPDF Reader version 2.x prior to 2.2.1, which creates a significant security risk for users of this popular lightweight PDF viewer. This type of vulnerability occurs when a program continues to reference memory that has already been freed, creating opportunities for malicious actors to manipulate program execution flow. The flaw specifically affects the PDF parsing functionality of SumatraPDF, making it susceptible to remote code execution when processing specially crafted malicious PDF files. The vulnerability demonstrates the inherent complexity of PDF parsing engines and the challenges of memory management in document rendering software.
The technical nature of this vulnerability aligns with CWE-416, which categorizes use-after-free conditions as a common memory safety issue. When SumatraPDF processes a malformed PDF document, the parser fails to properly manage memory references during object destruction, leading to a situation where freed memory locations can be reused. Attackers can exploit this by crafting a PDF file that triggers specific parsing sequences, causing the application to execute arbitrary code with the privileges of the user running the vulnerable software. This represents a classic remote code execution vector that leverages the application's trust in PDF document content without proper validation.
The operational impact of CVE-2013-2830 extends beyond simple exploitation, as it enables sophisticated attack scenarios that can compromise entire systems. According to ATT&CK framework category T1059, this vulnerability allows for command and control operations through code execution, while T1203 covers the exploitation of software vulnerabilities for privilege escalation. The vulnerability affects users who frequently download or receive PDF documents from untrusted sources, making it particularly dangerous in enterprise environments where document sharing is common. The remote nature of the attack means that users can be compromised without direct interaction with malicious content, simply by opening a specially crafted PDF file.
Mitigation strategies for this vulnerability require immediate patching of the affected SumatraPDF versions, as the only reliable solution is updating to version 2.2.1 or later where the memory management issues have been addressed. Organizations should implement strict PDF file validation policies and consider sandboxing PDF viewing applications to limit potential damage from exploitation attempts. Network security controls including web application firewalls and content filtering systems can help prevent delivery of malicious PDF files to end users. The vulnerability also highlights the importance of regular security updates and the need for proper input validation in document processing applications, as similar issues have been documented in other PDF readers and document processing libraries. Security teams should monitor for indicators of compromise related to this vulnerability and ensure that all PDF handling software is kept current with security patches to prevent exploitation attempts.