SB2020040421 - Input validation error in xen (Alpine package)
Published: April 4, 2020
Security Bulletin ID
SB2020040421
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Input validation error (CVE-ID: CVE-2019-18420)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green
The vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the VCPUOP_initialise hypercall in Xen. A remote user on a guest operating system can run a specially crafted program and perform a denial of service attack against the host operating system.
Remediation
Install update from vendor's website.