SB2021081017 - Remote code execution in Microsoft Windows Hyper-V
Published: August 10, 2021
Security Bulletin ID
SB2021081017
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
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-2021-26424)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote user to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in tcpip.sys when processing TCP/IP packets sent via IPv6 protocol. A remote Hyper-V guest can send a specially crafted IPv6 ping to the affected Hyper-V host, trigger memory corruption and execute arbitrary code on the system.
Remediation
Install update from vendor's website.