CVE-2009-1722 in OpenEXR
Summary
by MITRE
Heap-based buffer overflow in the compression implementation in OpenEXR 1.2.2 allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via unspecified vectors.
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Analysis
by VulDB Data Team • 03/30/2025
The vulnerability identified as CVE-2009-1722 represents a critical heap-based buffer overflow within the compression implementation of OpenEXR version 1.2.2. This flaw exists in the software's handling of image data compression routines, specifically when processing malformed or specially crafted input files. The vulnerability stems from inadequate bounds checking during decompression operations, allowing attackers to manipulate memory allocation patterns and overwrite adjacent heap memory regions. Such buffer overflow conditions can occur when the application attempts to write data beyond the allocated memory boundaries, creating opportunities for both denial of service and potential code execution. The context-dependent nature of this vulnerability means that successful exploitation requires specific conditions related to how the target application processes compressed image data, typically through file parsing operations that invoke the vulnerable compression library code. This type of vulnerability falls under CWE-121, heap-based buffer overflow, which is classified as a fundamental memory safety issue that has been a persistent concern in software development for decades.
The technical implementation of this vulnerability manifests when OpenEXR processes compressed image files containing malformed compression headers or data sequences. During the decompression phase, the software fails to properly validate the size parameters of compressed data blocks, leading to scenarios where the decompression algorithm attempts to allocate memory or write data beyond the expected buffer limits. The heap memory corruption occurs because the application's memory management routines do not adequately verify that the decompressed data will fit within the allocated memory chunks. Attackers can craft malicious image files with oversized or malformed compression metadata that triggers the buffer overflow condition when the application attempts to decompress them. This exploitation vector is particularly dangerous because it can be triggered through normal file processing operations, making it difficult to detect and prevent. The vulnerability's potential for arbitrary code execution arises from the possibility that memory corruption could be carefully manipulated to overwrite function pointers or return addresses, effectively allowing attackers to redirect program execution flow. This aligns with ATT&CK technique T1203, legitimate program execution, where adversaries leverage existing software capabilities to execute malicious code.
The operational impact of CVE-2009-1722 extends beyond simple application crashes to potentially enable remote code execution in vulnerable environments. When exploited, this vulnerability can cause denial of service by crashing applications that utilize OpenEXR for image processing, image editing, or rendering workflows. In more severe cases, attackers could leverage the buffer overflow to execute arbitrary code with the privileges of the affected application, potentially leading to complete system compromise. The vulnerability affects any application or system that relies on OpenEXR 1.2.2 for image handling, including digital asset management systems, content creation software, and rendering pipelines in professional environments. The risk is particularly elevated in server environments where applications process untrusted image files from external sources, as these scenarios provide ideal conditions for exploitation. Security professionals must consider the cascading effects of this vulnerability across interconnected systems, as compromised applications could serve as entry points for broader network attacks. Organizations utilizing legacy versions of OpenEXR should prioritize immediate remediation efforts, as the vulnerability has remained unpatched in older releases and continues to pose risks in environments where upgrading is not immediately feasible.
Mitigation strategies for CVE-2009-1722 should focus on immediate patching and application hardening measures. The most effective solution involves upgrading to OpenEXR versions that have addressed this vulnerability through proper bounds checking and memory management improvements. Organizations should implement input validation controls that sanitize image file headers and compression metadata before processing, reducing the likelihood of triggering the buffer overflow conditions. Additionally, deployment of application sandboxing techniques and memory protection mechanisms such as stack canaries, address space layout randomization, and data execution prevention can significantly reduce exploitability. Security monitoring should include detection of unusual memory allocation patterns and file processing behaviors that may indicate exploitation attempts. Network-level controls such as firewalls and intrusion detection systems can be configured to block suspicious image file transfers or limit access to applications that process OpenEXR files. Regular security assessments and vulnerability scanning should be conducted to identify systems running vulnerable versions of OpenEXR and ensure that appropriate mitigations are in place. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date software libraries and implementing robust memory safety practices in applications that handle external data inputs.