#VU13470 Race condition in Linux kernel - CVE-2018-12633
Published: June 25, 2018 / Updated: June 26, 2018
Vulnerability identifier: #VU13470
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2018-12633
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
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.