SB2019092420 - Red Hat update for redhat-virtualization-host
Published: September 24, 2019
Security Bulletin ID
SB2019092420
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2019-14835)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to a boundary error within the vhost/vhost_net Linux kernel module during the live migration flow when processing dirty log entries. A privileged guest user can pass descriptors with invalid length to the host when migration is on the way, trigger buffer overflow and execute arbitrary code on the host OS.
Remediation
Install update from vendor's website.