SB2021041408 - Use of insufficiently random values in Siemens Nucleus DNS
Published: April 14, 2021
Security Bulletin ID
SB2021041408
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use of insufficiently random values (CVE-ID: CVE-2021-27393)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the DNS client does not properly randomize UDP port numbers of DNS requests. A remote attacker can poison the DNS cache or spoof DNS resolving.
Remediation
Install update from vendor's website.