SB2021041409 - Multiple vulnerabilities in Siemens Nucleus Products

Description

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write (CVE-ID: CVE-2020-15795)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in the DNS domain name label parsing functionality. A remote attacker can trigger out-of-bounds write and execute arbitrary code on the target system.

2) Use of Out-of-range Pointer Offset (CVE-ID: CVE-2020-27009)

CWE-ID: CWE-823 - Use of Out-of-range Pointer Offset

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the DNS domain name record decompression functionality does not properly validate the pointer offset values. A remote atttacker can execute arbitrary code on the system.

Remediation

Install update from vendor's website.

References

• https://ics-cert.us-cert.gov/advisories/icsa-21-103-04
• https://cert-portal.siemens.com/productcert/pdf/ssa-185699.pdf