A vulnerability in the ngx_http_mp4_module component of Nginx could allow an unauthenticated, remote attacker to access sensitive information or cause a denial of service (DoS) condition on a targeted system.
The vulnerability is due to improper handling of MP4 files by the ngx_http_mp4_module component of the affected software. An attacker could exploit this vulnerability by persuading a user to access an MP4 file that submits malicious input to an affected system. A successful exploit could allow the attacker to access sensitive memory content from a worker process, cause an infinite loop condition in a worker process, or cause a worker process to crash, resulting in a DoS condition.
nginx.org has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker may use misleading language and instructions to persuade a user on the system to access a malicious MP4 file.
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.
nginx.org has released a security advisory at the following link: CVE-2018-16845
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Cisco Multivendor Vulnerability Alerts respond to vulnerabilities identified in third-party vendors' products. These alerts contain information compiled from diverse sources and provide comprehensive technical descriptions, objective analytical assessments, workarounds and practical safeguards, and links to vendor advisories and patches.