CVE-2015-7894 in Galaxy
Summary
by MITRE
The DCMProvider service in Samsung LibQjpeg on a Samsung SM-G925V device running build number LRX22G.G925VVRU1AOE2 allows remote attackers to cause a denial of service (segmentation fault and process crash) and execute arbitrary code via a crafted JPG.
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Analysis
by VulDB Data Team • 06/08/2024
The vulnerability identified as CVE-2015-7894 represents a critical security flaw within the DCMProvider service component of Samsung's LibQjpeg library, specifically affecting the Samsung SM-G925V device operating on build LRX22G.G925VVRU1AOE2. This vulnerability resides in the image processing functionality that handles jpeg file parsing, creating a pathway for remote exploitation that can result in both denial of service conditions and arbitrary code execution. The flaw demonstrates how image processing libraries can become attack vectors when inadequate input validation and memory management practices are implemented within mobile device firmware components.
The technical nature of this vulnerability stems from insufficient bounds checking and memory management within the jpeg parsing routines of the LibQjpeg library. When a maliciously crafted jpeg file is processed by the DCMProvider service, the library fails to properly validate the file structure and content, leading to buffer overflows or invalid memory accesses that trigger segmentation faults. This type of vulnerability maps directly to CWE-121, which describes stack-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read conditions. The vulnerability operates at the intersection of software security and mobile device firmware, where image processing components are often overlooked in security assessments despite their critical role in user-facing applications.
The operational impact of CVE-2015-7894 extends beyond simple service disruption to encompass potential remote code execution capabilities that could enable attackers to gain unauthorized control over affected devices. A remote attacker capable of delivering a malicious jpeg file to a target device could trigger the segmentation fault that causes the process to crash, effectively creating a denial of service condition that renders the device temporarily unusable. More critically, the vulnerability allows for arbitrary code execution, which could enable attackers to install malware, exfiltrate data, or establish persistent access to the compromised device. This aligns with ATT&CK technique T1059.007 for command and scripting interpreter, and T1068 for exploit for privilege escalation, as the initial exploitation could lead to further system compromise.
Mitigation strategies for this vulnerability require immediate firmware updates from Samsung to address the underlying buffer overflow conditions in the LibQjpeg library. Organizations and users should implement network-based filtering to block suspicious jpeg file transfers and consider deploying mobile device management solutions that can enforce security policies and monitor for anomalous image processing activities. The vulnerability highlights the importance of comprehensive security testing for all components within mobile device firmware, particularly those handling user input through common file formats. Additionally, implementing sandboxing mechanisms for image processing operations and regular security audits of third-party libraries can help prevent similar vulnerabilities from being introduced into mobile device ecosystems. This case demonstrates how vulnerabilities in seemingly benign components like image decoders can create significant security risks when exploited remotely.