Use-after-free in Siemens products - CVE-2022-20158

Vulnerability identifier: #VU73781

CSH Severity: Low

CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2022-20158

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerable software:
RUGGEDCOM RM1224 LTE(4G) EU
RUGGEDCOM RM1224 LTE(4G) NAM
SCALANCE M804PB
SCALANCE M812-1 ADSL-Router (Annex A)
SCALANCE M812-1 ADSL-Router (Annex B)
SCALANCE M816-1 ADSL-Router (Annex A)
SCALANCE M816-1 ADSL-Router (Annex B)
SCALANCE M826-2 SHDSL-Router
SCALANCE M874-2
SCALANCE M874-3
SCALANCE M876-3 (EVDO)
SCALANCE M876-3 (ROK)
SCALANCE M876-4
SCALANCE M876-4 (EU)
SCALANCE M876-4 (NAM)
SCALANCE MUM853-1 (EU)
SCALANCE MUM856-1 (EU)
SCALANCE MUM856-1 (RoW)
SCALANCE S615 EEC
SCALANCE S615

Software vendor:
Siemens

The vulnerability allows a local user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in bdi_put and bdi_unregister of backing-dev.c. A local administrator can gain elevated privileges on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Install updates from vendor's website.

• https://cert-portal.siemens.com/productcert/txt/ssa-419740.txt