Linux Kernel flexcop_usb_probe Function NULL Pointer Dereference Vulnerability [CVE-2019-15291]

CVE number – CVE-2019-15291

A vulnerability in the Linux Kernel could allow a local attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to a NULL pointer dereference condition that exists in the flexcop_usb_probe function, as defined in the drivers/media/usb/b2c2/flexcop-usb.c source code file of the affected software.

An attacker with physical access to a targeted system could exploit this vulnerability by inserting a USB device that submits malicious input to the targeted system. A successful exploit could cause a DoS condition on the system.

Proof-of-concept (PoC) code that demonstrates an exploit of this vulnerability is publicly available.

Kernel.org has not confirmed the vulnerability and software updates are not available.

Analysis

  • To exploit this vulnerability, an attacker must have physical access to the targeted system. This access requirement may 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 access local systems.Administrators are advised to allow only privileged users to access administration or management systems.Administrators are advised to monitor critical systems.

Vendor Announcements

  • At the time this alert was first published, Kernel.org had not released a security announcement.

Fixed Software

  • At the time this alert was first published, Kernel.org had not released software updates.

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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