CVE-2017-15232 in libjpeg-turbo
Summary
by MITRE
libjpeg-turbo 1.5.2 has a NULL Pointer Dereference in jdpostct.c and jquant1.c via a crafted JPEG file.
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Analysis
by VulDB Data Team • 01/03/2023
The vulnerability CVE-2017-15232 represents a critical NULL pointer dereference flaw in libjpeg-turbo version 1.5.2 that affects the jpeg decompression process. This issue manifests in two primary files within the library's codebase: jdpostct.c and jquant1.c, which handle post-processing and color quantization operations respectively. The vulnerability arises when processing maliciously crafted jpeg files that exploit memory access patterns during decompression, leading to a program crash or potential denial of service condition. The flaw demonstrates characteristics consistent with CWE-476 which specifically addresses NULL pointer dereference vulnerabilities in software systems.
The technical implementation of this vulnerability occurs during the jpeg decompression workflow when the library attempts to access memory locations that have not been properly initialized or allocated. In jdpostct.c and jquant1.c, the code fails to validate input parameters or check for proper memory allocation before attempting to dereference pointers that may remain NULL. This particular flaw represents a classic buffer management error where the decompression algorithm assumes certain memory structures will be properly populated, but encounters null references during processing. The vulnerability is particularly concerning because jpeg files are widely used across multiple platforms and applications, making the attack surface extensive.
Operationally, this vulnerability creates significant risks for systems that process untrusted jpeg content, including web servers, image processing applications, and document management systems. An attacker could craft a malicious jpeg file that, when processed by vulnerable software, would trigger the NULL pointer dereference and cause the application to crash. This type of vulnerability can be exploited for denial of service attacks against critical infrastructure where image processing is a core function. The impact extends beyond simple crashes as the vulnerability could potentially be chained with other exploits or used to bypass security controls in systems that rely on proper jpeg handling. According to ATT&CK framework, this vulnerability maps to T1499.004 which covers network denial of service attacks and T1203 which involves exploitation of software vulnerabilities for system disruption.
Mitigation strategies for CVE-2017-15232 should prioritize immediate patching of libjpeg-turbo installations to versions that have addressed this specific NULL pointer dereference issue. Organizations should implement robust input validation and sanitization protocols for all jpeg files processed by their systems, including signature verification and content scanning. Network segmentation and application whitelisting can help limit the potential impact of exploitation attempts. Additionally, monitoring systems should be configured to detect unusual application crashes or restart patterns that might indicate exploitation attempts. The vulnerability underscores the importance of maintaining up-to-date third-party libraries and implementing comprehensive software supply chain security measures. Security teams should also consider implementing sandboxing techniques for image processing operations and establishing incident response procedures specifically for handling such denial of service vulnerabilities.