CVE-2022-41837 in OpenImageIO
Summary
by MITRE • 12/23/2022
An out-of-bounds write vulnerability exists in the OpenImageIO::add_exif_item_to_spec functionality of OpenImageIO Project OpenImageIO v2.4.4.2. Specially-crafted exif metadata can lead to stack-based memory corruption. An attacker can provide a malicious file to trigger this vulnerability.
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Analysis
by VulDB Data Team • 01/23/2023
The vulnerability CVE-2022-41837 represents a critical out-of-bounds write flaw within the OpenImageIO library's image processing capabilities. This issue resides in the OpenImageIO::add_exif_item_to_spec function which handles the extraction and processing of EXIF metadata from image files. The vulnerability specifically affects version 2.4.4.2 of the OpenImageIO project, a widely-used open-source library for handling various image formats including jpeg tiff and png. When processing specially crafted EXIF metadata, the library fails to properly validate the bounds of memory operations, leading to potential stack-based memory corruption that could be exploited by malicious actors.
The technical implementation of this vulnerability stems from inadequate input validation within the EXIF metadata parsing routine. When the add_exif_item_to_spec function encounters malformed or crafted EXIF data, it attempts to write data beyond the allocated memory boundaries of its internal buffers. This type of flaw falls under the CWE-787 weakness category, which specifically addresses out-of-bounds writes that can result in arbitrary code execution or system instability. The vulnerability manifests as a stack-based buffer overflow since the affected code operates on stack-allocated memory structures without proper boundary checks. The attack surface expands significantly because EXIF metadata is commonly embedded within image files and is automatically processed during image loading operations.
The operational impact of this vulnerability extends beyond simple memory corruption, potentially enabling remote code execution or denial of service attacks. An attacker who can control the contents of an image file containing malicious EXIF metadata can trigger this vulnerability when any application using OpenImageIO attempts to load or process that image. This includes web applications image viewers and content management systems that rely on the library for image handling. The vulnerability is particularly concerning because it requires no special privileges to exploit and can be triggered through normal image processing workflows. The ATT&CK framework categorizes this as a code injection technique under T1059 where an attacker can leverage memory corruption vulnerabilities to execute arbitrary code within the context of the vulnerable application.
Mitigation strategies for CVE-2022-41837 should focus on immediate patching of affected systems and implementation of defensive measures. Organizations should upgrade to OpenImageIO version 2.4.4.3 or later which contains the necessary fixes for this vulnerability. Additionally, implementing input validation and sanitization of image files at the application level can provide additional defense in depth. Security controls such as sandboxing image processing operations and limiting file size constraints can reduce the attack surface. Network-level protections including content filtering and file type validation can prevent malicious image files from reaching vulnerable applications. System administrators should also monitor for unusual memory access patterns and implement intrusion detection systems that can identify potential exploitation attempts. The vulnerability demonstrates the importance of thorough input validation in image processing libraries and highlights the need for comprehensive security testing of multimedia handling components in enterprise applications.