SB2020041909 - Missing Authorization in xen (Alpine package) 

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2020041909

SB2020041909 - Missing Authorization in xen (Alpine package)

Published: April 19, 2020

Security Bulletin ID SB2020041909
Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Missing Authorization (CVE-ID: CVE-2020-11741)

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. A remote user can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References