SB2018091129 - Ubuntu update for linux, linux-aws, linux-azure and more
Published: September 11, 2018 Updated: October 31, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2017-13695)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists in the Linux kernel's ACPI subsystem where a function does not flush the operand cache and causes a kernel stack dump. A local user can pass a specially crafted ACPI table to obtain sensitive information from kernel memory and bypass the KASLR protection mechanism.
2) Improper initialization (CVE-ID: CVE-2018-1118)
CWE-ID: CWE-665 - Improper Initialization
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to obtain potentially sensitive information on the target system.
The weakness exists in the vhost/vhost.c:vhost_new_msg() function due to improper initialization of memory in messages that are passed between virtual guests and the host operating system. A local attacker can read from the /dev/vhost-net device file and read sensitive kernel memory information.
Remediation
Install update from vendor's website.