10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
8.1 High
AI Score
Confidence
Low
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.954 High
EPSS
Percentile
99.3%
Palo Alto Networks has shared remediation guidance for a recently disclosed critical security flaw impacting PAN-OS that has come under active exploitation.
The vulnerability, tracked as CVE-2024-3400 (CVSS score: 10.0), could be weaponized to obtain unauthenticated remote shell command execution on susceptible devices. It has been addressed in multiple versions of PAN-OS 10.2.x, 11.0.x, and 11.1.x.
There is evidence to suggest that the issue has been exploited as a zero-day since at least March 26, 2024, by a threat cluster tracked as UTA0218.
The activity, codenamed Operation MidnightEclipse, entails the use of the flaw to drop a Python-based backdoor called UPSTYLE that’s capable of executing commands transmitted via specially crafted requests.
The intrusions have not been linked to a known threat actor or group, but it’s suspected to be a state-backed hacking crew given the tradecraft and the victimology observed.
The latest remediation advice offered by Palo Alto Networks is based on the extent of compromise -
“Performing a private data reset eliminates risks of potential misuse of device data,” Palo Alto Networks said. “A factory reset is recommended due to evidence of more invasive threat actor activity.”
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10 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
8.1 High
AI Score
Confidence
Low
7.5 High
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
0.954 High
EPSS
Percentile
99.3%