CVE-2017-14290 in STDU Viewer
Summary
by MITRE
STDU Viewer 1.6.375 allows attackers to execute arbitrary code or cause a denial of service via a crafted .jb2 file, related to "Heap Corruption starting at wow64!Wow64NotifyDebugger+0x000000000000001d."
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Analysis
by VulDB Data Team • 11/14/2019
The vulnerability identified as CVE-2017-14290 affects STDU Viewer version 1.6.375, a document viewing application that processes various file formats including the .jb2 format. This issue represents a critical heap corruption vulnerability that can be exploited through maliciously crafted .jb2 files, potentially enabling remote code execution or denial of service conditions. The vulnerability manifests specifically within the heap memory management of the application, where improper handling of input data leads to memory corruption that can be leveraged by attackers to gain unauthorized system access or disrupt service availability.
The technical flaw stems from inadequate bounds checking and memory allocation handling within the JB2 file parser component of STDU Viewer. When processing specially crafted .jb2 files, the application fails to properly validate the structure and size of data elements, leading to buffer overflows that corrupt heap metadata and potentially overwrite critical program memory regions. The vulnerability signature indicates that the corruption occurs at wow64!Wow64NotifyDebugger+0x000000000000001d, suggesting that the issue involves x64 Windows compatibility layer interactions and indicates potential exploitation through debugging interfaces that are typically used for privilege escalation or code execution. This heap corruption vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite heap memory structures.
The operational impact of this vulnerability extends beyond simple denial of service scenarios, as successful exploitation could allow attackers to execute arbitrary code with the privileges of the affected application. This creates significant risk for users who may unknowingly open maliciously crafted .jb2 files, potentially leading to complete system compromise. The vulnerability affects systems running Windows operating systems where STDU Viewer is installed, particularly those where the application is used to process untrusted documents from external sources. Attackers could leverage this vulnerability through social engineering campaigns, email attachments, or compromised websites that distribute malicious .jb2 files designed to exploit the heap corruption in the viewer application.
Mitigation strategies for CVE-2017-14290 should include immediate application updates from the vendor to address the heap corruption issue, followed by network segmentation and access controls to limit exposure. Security teams should implement file type filtering and content validation for .jb2 files, particularly when these files originate from untrusted sources. Additionally, monitoring for suspicious process behavior and memory access patterns can help detect exploitation attempts. According to ATT&CK framework, this vulnerability maps to techniques involving execution through compromised applications and privilege escalation through memory corruption, making it a significant concern for defensive operations. Organizations should also consider implementing application whitelisting policies that restrict execution of untrusted document viewers and maintain regular patching schedules to address similar heap-based vulnerabilities in other software components.