Buffer overflow in Siemens products - CVE-2021-31893
Published: July 14, 2021
Vulnerability identifier: #VU54869
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-31893
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing certain files. A remote authenticated attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
SIMATIC PCS 7
SIMATIC STEP 7
SIMATIC PDM
SINAMICS STARTER
SIMATIC STEP 7
SIMATIC PDM
SINAMICS STARTER
How to mitigate CVE-2021-31893
Install updates from vendor's website.
SIMATIC PCS 7 - update to 9.0 SP3
SINAMICS STARTER - update to 5.4 HF2
SIMATIC STEP 7 - update to 5.6 SP2 HF3
SIMATIC PDM - update to 9.2
SINAMICS STARTER - update to 5.4 HF2
SIMATIC STEP 7 - update to 5.6 SP2 HF3
SIMATIC PDM - update to 9.2