CVE-2014-9848 in ImageMagick
Summary
by MITRE
Memory leak in ImageMagick allows remote attackers to cause a denial of service (memory consumption).
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Analysis
by VulDB Data Team • 11/04/2024
CVE-2014-9848 represents a critical memory leak vulnerability within ImageMagick, a widely deployed image processing library that forms the backbone of numerous web applications, content management systems, and digital asset management platforms. This vulnerability resides in the library's handling of certain image formats, specifically affecting how it processes malformed or specially crafted image files. The flaw manifests when ImageMagick attempts to parse and process these images, leading to improper memory deallocation during the processing lifecycle. Attackers can exploit this by uploading or referencing malicious image files that trigger the memory leak condition, causing the application to continuously allocate memory without proper release mechanisms.
The technical implementation of this vulnerability stems from insufficient memory management within ImageMagick's image parsing routines, particularly when dealing with specific format specifications that create recursive or circular memory references. This type of flaw aligns with CWE-401, which categorizes improper handling of memory allocation and deallocation scenarios. The vulnerability is particularly dangerous because it can be exploited through web applications that utilize ImageMagick for image processing, allowing remote attackers to consume system resources progressively until the target system becomes unresponsive or crashes entirely. The memory leak occurs during the image format conversion and processing phases, where the library fails to properly clean up allocated memory blocks when encountering malformed input data.
From an operational perspective, this vulnerability presents a significant risk to organizations relying on ImageMagick for image processing services, as it can be leveraged for distributed denial of service attacks against web servers, content management systems, and application platforms. The impact extends beyond simple resource exhaustion, as it can affect system availability and performance across multiple services that depend on the vulnerable library. Attackers can maintain persistent resource consumption by repeatedly submitting malicious image files, making this vulnerability particularly effective for sustained attacks against web applications. The vulnerability affects various versions of ImageMagick prior to the patch release, with the specific conditions that trigger the memory leak varying based on the image format and the structure of the malicious payload.
Mitigation strategies for CVE-2014-9848 should prioritize immediate patching of affected ImageMagick installations to the latest stable versions that contain memory management fixes. Organizations should implement input validation measures that filter or reject suspicious image files before they reach the ImageMagick processing layer, utilizing file type verification and size constraints to prevent exploitation. Network-level protections including rate limiting and automated scanning of uploaded content can help detect and block malicious image submissions. Additionally, implementing memory monitoring and alerting systems can help identify when applications begin consuming excessive memory due to the vulnerability. The ATT&CK framework categorizes this type of exploitation under T1499, which covers resource exhaustion attacks, and T1059, which involves command and control communications that may be used to maintain persistent access after initial exploitation. System administrators should also consider isolating image processing functions in sandboxed environments to limit the potential impact of successful exploitation attempts.