SB2018031521 - Debian update for libvirt
Published: March 15, 2018
Security Bulletin ID
SB2018031521
Severity
Low
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Resource exhaustion (CVE-ID: CVE-2018-1064)
The vulnerability allows a local attacker to cause DoS condition on the target system.
The weakness exists in the qemu_agent.c source code file due to an incomplete fix for CVE-2018-5748 that affects the QEMU monitor. A local attacker can consume excessive amounts of memory resources and cause the service to crash.
2) Resource exhaustion (CVE-ID: CVE-2018-5748)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists due to a flaw in qemu/qemu_monitor.c in libvirt. A remote attacker can supply a large QEMU reply, trigger resource exhaustion and cause the service to crash.
3) Security restrictions bypass (CVE-ID: CVE-2018-6764)
The vulnerability allows an adjacent attacker to bypass security restrictions on the target system.The weakness exists in the util/virlog.c source code file due to improper determination of hostnames during LXC container startup. An adjacent attacker can bypass security restrictions and execute arbitrary commands.
Remediation
Install update from vendor's website.