SB2017112904 - Multiple vulnerabilities in Xen
Published: November 29, 2017 Updated: November 29, 2017
Security Bulletin ID
SB2017112904
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Privilege escalation (CVE-ID: CVE-2017-17045)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an adjacent attacker to gain elevated privileges on the target system.
The weakness exists due to improper privileges control. An adjacent attacker can trigger a p2m error checking flaw in the Populate on Demand (PoD) code and gain write access to freed memory and gain elevated privileges on the host system.
2) Infinite loop (CVE-ID: CVE-2017-17044)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an adjacent attacker to cause DoS condition on the target system.
The weakness exists due to an infinite loop. An adjacent attacker can trigger an error handling flaw in the processing of errors from the Populate on Demand (PoD) code and cause the service to crash.
Remediation
Install update from vendor's website.