CVE-2024-25448 in imlib2
Summary
by MITRE • 02/09/2024
An issue in the imlib_free_image_and_decache function of imlib2 v1.9.1 allows attackers to cause a heap buffer overflow via parsing a crafted image.
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Analysis
by VulDB Data Team • 08/19/2024
The vulnerability identified as CVE-2024-25448 resides within the imlib2 library version 1.9.1, specifically within the imlib_free_image_and_decache function. This flaw represents a critical heap buffer overflow condition that arises during the parsing of maliciously crafted image files. The imlib2 library serves as a fundamental component for image handling in numerous applications and systems, making this vulnerability particularly concerning for widespread impact. The buffer overflow occurs when the library attempts to free memory associated with image data that has been improperly parsed, leading to potential memory corruption that could be exploited by malicious actors.
The technical nature of this vulnerability stems from inadequate bounds checking and memory management within the image parsing and deallocation processes. When imlib2 encounters a malformed image file, the imlib_free_image_and_decache function fails to properly validate the image data structure before attempting to release associated memory resources. This oversight creates a scenario where attacker-controlled data can overwrite adjacent memory locations, potentially leading to arbitrary code execution. The vulnerability manifests as a heap-based buffer overflow, which is classified under CWE-121 in the Common Weakness Enumeration catalog, specifically covering heap-based buffer overflow conditions where insufficient bounds checking allows writing beyond allocated memory regions.
From an operational perspective, this vulnerability poses significant risks to systems that rely on imlib2 for image processing capabilities. Applications including web browsers, image viewers, content management systems, and various multimedia software packages that utilize imlib2 could be compromised. The attack vector requires an attacker to craft a malicious image file that, when processed by an application using vulnerable imlib2 versions, triggers the buffer overflow condition. This makes the vulnerability particularly dangerous in web-based environments where users may unknowingly download and process malicious images. The potential impact extends to privilege escalation scenarios where successful exploitation could allow attackers to execute arbitrary code with the privileges of the affected application.
Mitigation strategies for CVE-2024-25448 should prioritize immediate patching of affected imlib2 installations to version 1.9.2 or later, which contains the necessary fixes for the heap buffer overflow condition. System administrators should conduct comprehensive inventory assessments to identify all applications and services utilizing vulnerable imlib2 versions, particularly focusing on web-facing applications and image processing systems. Additional defensive measures include implementing strict input validation for image files, employing sandboxing techniques for image processing operations, and deploying intrusion detection systems that monitor for anomalous memory access patterns. The vulnerability aligns with ATT&CK technique T1203 - Exploitation for Client Execution, as it enables attackers to execute malicious code through compromised image processing functionality. Organizations should also consider implementing application whitelisting policies and restricting user permissions for image handling operations to minimize potential exploitation impact. Regular security assessments and vulnerability scanning should be conducted to ensure continued protection against similar memory corruption vulnerabilities in image processing libraries.