SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2022-34819

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…

CRITICAL 10.0EPSS 2.02%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (2.02%). 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 lacks proper validation of user-supplied data when parsing specific messages. This could result in a heap-based buffer overflow. An attacker could leverage this vulnerability to execute code in the context of device.

CVSS 3.1
10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
2.02% probability · 80th percentile
CISA KEV
Not listed
Weakness
CWE-122, CWE-787
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.