CVE-2019-6569 : Exploit Details and Defense Strategies

A vulnerability in Siemens SCALANCE network devices could allow an attacker to send harmful packets to systems within a mirrored network, impacting their configuration and behavior.

Understanding CVE-2019-6569

This CVE involves a flaw in the barriers of affected Siemens SCALANCE products that inadequately prevent data transfer over the mirror port into the mirrored network.

What is CVE-2019-6569?

The vulnerability allows attackers to exploit the monitor barrier of SCALANCE devices, enabling the transmission of malicious packets to systems in the mirrored network.

The Impact of CVE-2019-6569

Exploiting this vulnerability could lead to potential disruptions in the configuration and runtime behavior of systems within the mirrored network.

Technical Details of CVE-2019-6569

Siemens SCALANCE devices are affected by this vulnerability due to insufficient data blocking over the mirror port.

Vulnerability Description

The flaw in the monitor barrier of SCALANCE products allows attackers to forward harmful data into the mirrored network.

Affected Systems and Versions

SCALANCE X204-2, X204-2FM, X204-2LD, X204-2LD TS, X204-2TS, X206-1, X206-1LD, X208, X208PRO, X212-2, X212-2LD, X216, X224
SCALANCE X302-7 EEC, X302-7 EEC (coated), X302-7 EEC (24V), X302-7 EEC (24V, coated), X302-7 EEC (2x 230V), X302-7 EEC (2x 230V, coated), X302-7 EEC (2x 24V), X302-7 EEC (2x 24V, coated), X304-2FE, X306-1LD FE, X307-2 EEC (230V), X307-2 EEC (230V, coated), X307-2 EEC (24V), X307-2 EEC (24V, coated), X307-2 EEC (2x 230V), X307-2 EEC (2x 230V, coated), X307-2 EEC (2x 24V), X307-2 EEC (2x 24V, coated), X307-3, X307-3LD, X308-2, X308-2LD, X308-2LH, X308-2LH+, X308-2M, X308-2M PoE, X308-2M TS, X310, X310FE, X320-1 FE, X320-1-2LD FE, X408-2
SCALANCE XB205-3 (SC), XB205-3 (ST/BFOC), XB205-3LD, XB208, XB213-3 (SC), XB213-3 (ST/BFOC), XB213-3LD, XB216
SCALANCE XC206-2 (SC), XC206-2 (ST/BFOC), XC206-2SFP, XC206-2SFP EEC, XC206-2SFP G, XC206-2SFP G EEC, XC208, XC208EEC, XC208G, XC208G EEC, XC216, XC216-4C, XC216-4C G, XC216-4C G (EIP Def.), XC216-4C G EEC, XC216EEC, XC224, XC224-4C G, XC224-4C G (EIP Def.), XC224-4C G EEC
SCALANCE XF204, XF204 DNA, XF204-2, XF204-2BA, XF204-2BA DNA, XF206-1, XF208
SCALANCE XP208, XP208EEC, XP208PoE EEC, XP216, XP216EEC, XP216POE EEC
SCALANCE XR324-12M, XR324-4M EEC, XR324-4M PoE, XR324-4M PoE TS, XR324WG
SCALANCE XR328-4C WG
SIPLUS NET SCALANCE X308-2, XC206-2, XC206-2SFP, XC208, XC216-4C

Exploitation Mechanism

Attackers can exploit the vulnerability by sending harmful packets through the mirror port into the mirrored network, potentially disrupting system configurations and behavior.

Mitigation and Prevention

To address CVE-2019-6569, follow these mitigation steps:

Immediate Steps to Take

Apply patches provided by Siemens to fix the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch SCALANCE devices to protect against known vulnerabilities.
Monitor network traffic for any suspicious activity that may indicate exploitation attempts.

Patching and Updates

Siemens has released patches to address the vulnerability. Ensure all affected SCALANCE devices are updated to the latest patched versions.