CVE-2017-2587 in netpbm
Summary
by MITRE
A memory allocation vulnerability was found in netpbm before 10.61. A maliciously crafted SVG file could cause the application to crash.
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Analysis
by VulDB Data Team • 04/27/2023
The vulnerability identified as CVE-2017-2587 represents a critical memory allocation flaw within the netpbm image processing library, specifically affecting versions prior to 10.61. This issue arises from insufficient input validation when processing SVG (Scalable Vector Graphics) files, creating a potential avenue for denial of service attacks. The netpbm suite serves as a comprehensive collection of tools for converting and manipulating bitmap images, making it a widely used component in various image processing workflows and applications. When a maliciously crafted SVG file is processed by vulnerable versions of netpbm, the application's memory management routines fail to properly handle the malformed input, leading to unpredictable behavior and ultimately application crashes.
The technical root cause of this vulnerability stems from improper memory allocation handling during SVG parsing operations. When netpbm encounters an SVG file with malformed or maliciously constructed elements, the memory allocation functions do not adequately validate the size parameters or allocation requests derived from the input data. This deficiency allows attackers to craft SVG files that trigger excessive memory allocations or memory corruption conditions, causing the application to terminate abruptly. The vulnerability manifests as a buffer overflow or heap corruption scenario where the application attempts to allocate memory blocks that either exceed available resources or are improperly sized, resulting in segmentation faults or access violations that terminate the process.
From an operational perspective, this vulnerability presents significant risks to systems that utilize netpbm for image processing tasks, particularly in environments where user-supplied content is processed without proper validation. The impact extends beyond simple service disruption, as attackers could potentially leverage this vulnerability to cause repeated crashes in applications that depend on netpbm for image handling. This is especially concerning in web applications, content management systems, or any platform that accepts SVG uploads from untrusted sources, as it could enable attackers to systematically disrupt services through sustained denial of service attacks. The vulnerability aligns with CWE-122, which describes improper restriction of operations within a memory buffer, and represents a classic example of how malformed input can lead to memory corruption vulnerabilities.
The mitigation strategy for CVE-2017-2587 primarily involves upgrading to netpbm version 10.61 or later, which includes proper input validation and memory allocation safeguards. System administrators should also implement strict input validation policies for SVG files, particularly in web applications that process user uploads. Additional defensive measures include deploying network segmentation to limit exposure, implementing application firewalls, and establishing monitoring for unusual process termination patterns. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation through application flaws and denial of service attacks, with potential lateral movement opportunities if the vulnerable application runs with elevated privileges. Organizations should also consider implementing sandboxing mechanisms for image processing operations and regularly audit their image handling pipelines to ensure all components are properly patched and validated against known vulnerabilities.