SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2022-34820

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions < V3.3.46), SIMATIC CP 1243-1 (All versions < V3.3.46), SIMATIC CP 1243-7 LTE EU (All versions < V3.3.46), SIMATIC CP 1243-7 LTE US (All versions < V3.3.46), SIMATIC CP 1243-8 IRC…

HIGH 8.4EPSS 2.15%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.15%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability has been identified in SIMATIC CP 1242-7 V2 (All versions < V3.3.46), SIMATIC CP 1243-1 (All versions < V3.3.46), SIMATIC CP 1243-7 LTE EU (All versions < V3.3.46), SIMATIC CP 1243-7 LTE US (All versions < V3.3.46), SIMATIC CP 1243-8 IRC (All versions < V3.3.46), SIMATIC CP 1542SP-1 IRC (All versions >= V2.0 < V2.2.28), SIMATIC CP 1543-1 (All versions < V3.0.22), SIMATIC CP 1543SP-1 (All versions >= V2.0 < V2.2.28), SIPLUS ET 200SP CP 1542SP-1 IRC TX RAIL (All versions >= V2.0 < V2.2.28), SIPLUS ET 200SP CP 1543SP-1 ISEC (All versions >= V2.0 < V2.2.28), SIPLUS ET 200SP CP 1543SP-1 ISEC TX RAIL (All versions >= V2.0 < V2.2.28), SIPLUS NET CP 1242-7 V2 (All versions < V3.3.46), SIPLUS NET CP 1543-1 (All versions < V3.0.22), SIPLUS S7-1200 CP 1243-1 (All versions < V3.3.46), SIPLUS S7-1200 CP 1243-1 RAIL (All versions < V3.3.46). The application does not correctly escape some user provided fields during the authentication process. This could allow an attacker to inject custom commands and execute arbitrary code with elevated privileges.

CVSS 3.1
8.4 HIGHCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS
2.15% probability · 81th percentile
CISA KEV
Not listed
Weakness
CWE-77, CWE-116
Affected
siemens/simatic cp 1242-7 v2 firmware · siemens/simatic cp 1243-1 firmware · siemens/simatic cp 1243-7 lte eu firmware · siemens/simatic cp 1243-7 lte us firmware · siemens/simatic cp 1243-8 irc firmware · siemens/simatic cp 1542sp-1 irc firmware · siemens/simatic cp 1543-1 firmware · siemens/simatic cp 1543sp-1 firmware · siemens/siplus et 200sp cp 1542sp-1 irc tx rail firmware · siemens/siplus et 200sp cp 1543sp-1 isec firmware · siemens/siplus et 200sp cp 1543sp-1 isec tx rail firmware · siemens/siplus net cp 1242-7 v2 firmware · siemens/siplus net cp 1543-1 firmware · siemens/siplus s7-1200 cp 1243-1 firmware · siemens/siplus s7-1200 cp 1243-1 rail firmware
Source
productcert@siemens.com

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.