CVE-2021-31894
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.5 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
12.7%
A vulnerability has been identified in SIMATIC PCS 7 V8.2 and earlier (All versions), SIMATIC PCS 7 V9.X (All versions < V9.1 SP2), SIMATIC PDM (All versions < V9.2 SP2), SIMATIC STEP 7 V5.X (All versions < V5.7), SINAMICS STARTER (containing STEP 7 OEM version) (All versions < V5.4 SP2 HF1). A directory containing metafiles relevant to devices’ configurations has write permissions. An attacker could leverage this vulnerability by changing the content of certain metafiles and subsequently manipulate parameters or behavior of devices that would be later configured by the affected software.
Affected configurations
CNA Affected
[
{
"product": "SIMATIC PCS 7 V8.2 and earlier",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions"
}
]
},
{
"product": "SIMATIC PCS 7 V9.X",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions < V9.1 SP2"
}
]
},
{
"product": "SIMATIC PDM",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions < V9.2 SP2"
}
]
},
{
"product": "SIMATIC STEP 7 V5.X",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions < V5.7"
}
]
},
{
"product": "SINAMICS STARTER (containing STEP 7 OEM version)",
"vendor": "Siemens",
"versions": [
{
"status": "affected",
"version": "All versions < V5.4 SP2 HF1"
}
]
}
]Social References
More
Related
7.2 High
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.5 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
12.7%