#VU84387 Uncontrolled Recursion in Siemens products - CVE-2022-47374
Vulnerability identifier: #VU84387
Vulnerability risk: Medium
CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID:
CWE-ID:
CWE-674
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
SIMATIC S7-400 CPU 412-2 PN V7
Server applications /
SCADA systems
SIMATIC S7-400 CPU 414-3 PN/DP V7
Server applications /
SCADA systems
SIMATIC S7-400 CPU 414F-3 PN/DP V7
Server applications /
SCADA systems
SIMATIC S7-400 CPU 416-3 PN/DP V7
Server applications /
SCADA systems
SIMATIC S7-400 CPU 416F-3 PN/DP V7
Server applications /
SCADA systems
SIMATIC PC-Station Plus
Server applications /
SCADA systems
SIPLUS S7-400 CPU 414-3 PN/DP V7
Server applications /
SCADA systems
SIPLUS S7-400 CPU 416-3 PN/DP V7
Server applications /
SCADA systems
SINAMICS S120
Hardware solutions /
Firmware
Vendor: Siemens
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to uncontrolled recursion. A remote attacker can pass specially crafted input to the application and cause a denial of service condition on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
SIMATIC S7-400 CPU 412-2 PN V7: All versions
SIMATIC S7-400 CPU 414-3 PN/DP V7: All versions
SIMATIC S7-400 CPU 414F-3 PN/DP V7: All versions
SIMATIC S7-400 CPU 416-3 PN/DP V7: All versions
SIMATIC S7-400 CPU 416F-3 PN/DP V7: All versions
SIMATIC PC-Station Plus: All versions
SIPLUS S7-400 CPU 414-3 PN/DP V7: All versions
SIPLUS S7-400 CPU 416-3 PN/DP V7: All versions
SINAMICS S120: before 5.2
External links
https://cert-portal.siemens.com/productcert/pdf/ssa-892915.pdf
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
