SB2020021216 - Multiple vulnerabilities in Siemens Industrial Products

Description

This security bulletin contains information about 2 vulnerabilities.

1) Null pointer dereference (CVE-ID: CVE-2018-18065)

CWE-ID: CWE-476 - NULL Pointer Dereference

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

The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.

The vulnerability exists  in the _set_key() function, as defined in the agent/helpers/table_container.c source code file due to a NULL pointer exception bug. A remote attacker can send a malicious UDP packet, trigger a NULL pointer dereference condition, cause the application to crash.

2) Remote code execution (CVE-ID: CVE-2015-5621)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

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

The vulnerability allows a remote attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to the snmp_pdu_parse function in snmp_api.c does not remove the varBind variable in a netsnmp_variable_list item when parsing of the SNMP PDU fails. A remote attacker can supply specially crafted input and cause denial of service or execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://ics-cert.us-cert.gov/advisories/icsa-20-042-02