FFmpeg libavcodec/hevcdec.c NULL Pointer Dereference Denial of Service Vulnerability [CVE-2019-11338]

CVE Number – CVE-2019-11338

A vulnerability in the libavcodec/hevcdex.c source code of FFmpeg could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.The vulnerability exists because the affected software incorrectly detects duplicate first slices in the libavacodec/hevcdec.c source file. An attacker could exploit this vulnerability by supplying a crafted High Efficiency Video Coding (HEVC) file to the affected system. A successful exploit could allow the attacker to trigger a NULL pointer dereference error that could result in a DoS condition or other unpsecified impacts on the targeted system.FFmpeg has confirmed this vulnerability and released a software patch.

Analysis

  • To exploit this vulnerability, an attacker would need network access and the ability to supply the targeted system with a crafted HEVC file. These requirements could reduce the likelihood of a successful exploit.

Safeguards

  • Administrators are advised to apply the appropriate updates.Administrators are advised to allow only trusted users to have network access.Administrators are advised to monitor critical systems.

Vendor Announcements

Fixed Software

Duncan Newell

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.

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