16 May 2019
KLCERT-19-026: Siemens WinCC local denial of service
Vendor
Siemens
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CVE-IDS
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KLCERT
KLCERT-19-026
Timeline
Timeline
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Kaspersky ICS CERT advisory published
15 May 2019
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Vendor releases patch
May 2019
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Vulnerabilities acknowledged by Vendor
December 2018
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Vulnerabilities reported
December 2018
Description
An attacker with local access to the project file could cause a Denial-of-Service condition on the affected product while the project file is loaded.
Successful exploitation requires access to the project file. An attacker could use the vulnerability to compromise availability of the affected system.
Exploitability
Local
Attack complexity
User interaction
Impact
Existence of exploit
Unknown
Affected products
SIMATIC PCS 7 V8.0 and earlier: All versions
SIMATIC PCS 7 V8.1: All versions
SIMATIC PCS 7 V8.2: All versions
SIMATIC PCS 7 V9.0: All versions
SIMATIC WinCC (TIA Portal) V13: All versions
SIMATIC WinCC (TIA Portal) V14: All versions
SIMATIC WinCC (TIA Portal) V15: All versions
SIMATIC WinCC Runtime Professional: All versions
SIMATIC WinCC V7.2 and earlier: All versions
SIMATIC WinCC V7.3: All versions
SIMATIC WinCC V7.4: All versions
SIMATIC WinCC V7.5: All versions < V7.5 Upd3
Mitigation
Vendor mitigation
Siemens has identified the following specific workarounds and mitigations that customers can apply to reduce the risk:
- Apply Defense-in-Depth
- Enable “Encrypted communication” in SIMATIC WinCC and SIMATIC PCS 7.
- Only open project files from trusted locations.
Kaspersky Lab publishes information on newly identified vulnerabilities in order to raise user awareness of the IT security threats detected. Kaspersky Lab does not make any guarantees in respect of information received from vendors of products in which vulnerabilities have been identified, which is included in the following sections of the advisory: Affected Products, Vendor Mitigation.
