SB2018062606 - Denial of service in Linux Kernel

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Main Vulnerability Database SB2018062606

SB2018062606 - Denial of service in Linux Kernel

Published: June 26, 2018

Security Bulletin ID SB2018062606
Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Race condition (CVE-ID: CVE-2018-12633)

The vulnerability allows a local attacker to obtain potentially sensitive information or cause DoS condition on the target system.

The vulnerability exists due to race condition when the vbg_misc_device_ioctl() function, as defined in the drivers/virt/vboxguest/vboxguest_linux.c source code file, allows user data to be read twice with the copy_from_userfunction. A local attacker can trigger a race condition, modify critical variables as hdr.size_in and hdr.size_out in the header, trigger a buffer over-access condition and access sensitive information or cause the system to crash.


Remediation

Install update from vendor's website.

References