Exempi VPXChunk Class Denial of Service Vulnerability [CVE-2017-18235]
CVE Number – CVE-2017-18235
A vulnerability in Exempi could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.
The vulnerability exists in the VPXChunk class defined in the source code file XMPFiles/source/FormatSupport/WEBP_Support.cpp, and is due to insufficient sanitization of “0” values passed to height() or width() by the affected software when handling .webq files. An attacker could exploit the vulnerability by persuading a user to access a .webq file that submits malicious input to the affected software. A successful exploit could cause the affected software to crash due to a memory assertion error, which could result in a DoS condition.
Exempi has confirmed the vulnerability and released software updates.
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To exploit this vulnerability, the attacker may use misleading language or instructions to persuade a user to access a file that submits malicious input to the affected software.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Users are advised not to open email messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in email messages are safe, they are advised not to open them.
Users are advised not to visit websites or follow links that have suspicious characteristics or cannot be verified as safe.
Administrators are advised to use an unprivileged account when browsing the Internet.
Administrators are advised to monitor critical systems.
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Exempi has released a changelog for bug 101913 at the following link: 2.x series Changelog
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Exempi has released software updates at the following link: Download Exempi
Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.