Heap-based buffer overflow in Siemens products - CVE-2021-25668

Vulnerability identifier: #VU52214

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-25668

CWE-ID: CWE-122

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error. A remote attacker can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

SCALANCE X208PRO
SCALANCE XF208
SCALANCE XF206-1
SCALANCE XF204-2
SCALANCE XF204
SCALANCE X224
SCALANCE X216
SCALANCE X212-2LD
SCALANCE X212-2
SCALANCE X204-2
SCALANCE X208
SCALANCE X206-1LD
SCALANCE X206-1
SCALANCE X204-2TS
SCALANCE X204-2LD TS
SCALANCE X204-2LD
SCALANCE X204-2FM
SCALANCE X200-4P IRT
SCALANCE X201-3P IRT
SCALANCE X201-3P IRT PRO
SCALANCE X202-2 IRT
SCALANCE X202-2P IRT
SCALANCE X202-2P IRT PRO
SCALANCE X204 IRT
SCALANCE X204 IRT PRO
SCALANCE XF201-3P IRT
SCALANCE XF202-2P IRT
SCALANCE XF204 IRT
SCALANCE XF204-2BA IRT

Install updates from vendor's website.

SCALANCE X200-4P IRT - update to 5.5.1
SCALANCE X201-3P IRT - update to 5.5.1
SCALANCE X201-3P IRT PRO - update to 5.5.1
SCALANCE X202-2 IRT - update to 5.5.1
SCALANCE X202-2P IRT - update to 5.5.1
SCALANCE X202-2P IRT PRO - update to 5.5.1
SCALANCE X204 IRT - update to 5.5.1
SCALANCE X204 IRT PRO - update to 5.5.1
SCALANCE XF201-3P IRT - update to 5.5.1
SCALANCE XF202-2P IRT - update to 5.5.1
SCALANCE XF204 IRT - update to 5.5.1
SCALANCE XF204-2BA IRT - update to 5.5.1

• https://ics-cert.us-cert.gov/advisories/icsa-21-103-07
• https://cert-portal.siemens.com/productcert/pdf/ssa-187092.pdf

• Multiple vulnerabilities in Siemens SCALANCE X200