SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2018-11458

A vulnerability has been identified in SINUMERIK 828D V4.7 (All versions < V4.7 SP6 HF1), SINUMERIK 840D sl V4.7 (All versions < V4.7 SP6 HF5), SINUMERIK 840D sl V4.8 (All versions < V4.8 SP3).

HIGH 8.1EPSS 4.59%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (4.59%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability has been identified in SINUMERIK 828D V4.7 (All versions < V4.7 SP6 HF1), SINUMERIK 840D sl V4.7 (All versions < V4.7 SP6 HF5), SINUMERIK 840D sl V4.8 (All versions < V4.8 SP3). The integrated VNC server on port 5900/tcp of the affected products could allow a remote attacker to execute code with privileged permissions on the system by sending specially crafted network requests to port 5900/tcp. Please note that this vulnerability is only exploitable if port 5900/tcp is manually opened in the firewall configuration of network port X130. The security vulnerability could be exploited by an attacker with network access to the affected devices and port. Successful exploitation requires no privileges and no user interaction. The vulnerability could allow an attacker to compromise confidentiality, integrity and availability of the VNC server. At the time of advisory publication no public exploitation of this security vulnerability was known.

CVSS 3.0
8.1 HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
4.59% probability · 91th percentile
CISA KEV
Not listed
Weakness
CWE-190
Affected
siemens/sinumerik 828d v4.7 firmware · siemens/sinumerik 840d sl v4.7 firmware · siemens/sinumerik 840d sl v4.8 firmware
Source
productcert@siemens.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.