SB2021041515 - Multiple vulnerabilities in DNS Module of Siemens Nucleus Products
Published: April 15, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Improper Null Termination (CVE-ID: CVE-2020-27736)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to the DNS domain name label parsing functionality does not properly validate the null-terminated name in DNS-responses. A remote attacker can cause a denial of service condition or leak the read memory.
2) Out-of-bounds read (CVE-ID: CVE-2020-27737)
The vulnerability allows a remote attacker to compromise the target system.
The vulnerability exists due to a boundary condition in the DNS response parsing functionality. A remote attacker can trigger out-of-bounds read error and read contents of memory on the system or cause a denial of service (DoS) condition.
3) Access of Memory Location After End of Buffer (CVE-ID: CVE-2020-27738)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the DNS domain name record decompression functionality does not properly validate the pointer offset values. A remote attacker can cause a denial of service condition on the target system.
Remediation
Install update from vendor's website.