CVE-2017-14309 in STDU Viewer
Summary
by MITRE
STDU Viewer 1.6.375 allows attackers to cause a denial of service or possibly have unspecified other impact via a crafted .jb2 file, related to a "Read Access Violation starting at STDUJBIG2File!DllUnregisterServer+0x0000000000006ec8."
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Analysis
by VulDB Data Team • 11/15/2019
The vulnerability identified as CVE-2017-14309 affects STDU Viewer version 1.6.375, a document viewing application that processes various file formats including the JBIG2 standard. This flaw represents a critical security weakness that stems from improper input validation and memory management within the application's handling of JBIG2 files. The vulnerability manifests when the software encounters a maliciously crafted .jb2 file, which triggers a read access violation during the execution of the DllUnregisterServer function within the STDUJBIG2File module.
The technical exploitation of this vulnerability occurs through a specific memory access pattern that violates the application's expected behavior when processing malformed JBIG2 files. The error occurs at the address STDUJBIG2File!DllUnregisterServer+0x0000000000006ec8, indicating that the issue resides within the dynamic link library's unregistration process. This memory access violation constitutes a classic buffer overflow condition that can lead to application instability and potential system compromise. The flaw essentially allows an attacker to manipulate the application's memory management routines through crafted input, creating a scenario where normal application operation becomes impossible.
From an operational impact perspective, this vulnerability enables attackers to execute denial of service attacks against systems running STDU Viewer, effectively rendering the application unusable for legitimate users. The potential for unspecified other impacts suggests that the memory corruption could potentially be leveraged for more sophisticated attacks, including privilege escalation or code execution within the application's context. The vulnerability affects any system where the affected software is installed and actively processes JBIG2 files, making it particularly dangerous in enterprise environments where document processing is common.
The vulnerability aligns with CWE-125, which describes out-of-bounds read conditions, and represents a memory safety issue that can be exploited through improper input validation. According to ATT&CK framework, this vulnerability maps to T1499.004, specifically targeting application or system recovery by causing denial of service conditions. Organizations should prioritize immediate mitigation through software updates from the vendor, as no reliable workarounds exist for this particular flaw. The recommended approach includes implementing network segmentation to prevent unauthorized file uploads and conducting thorough vulnerability assessments to identify systems running affected versions of STDU Viewer. Additionally, security teams should monitor for exploitation attempts and consider implementing application whitelisting policies to restrict execution of vulnerable software in production environments.