cbcvebase.
CVE-2024-20359
published 2024-04-24

CVE-2024-20359: A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security…

PriorityP182medium6CVSS 3.1
AVLACLPRHUINSUCHIHAN
KEVITWRansomware
CISA Known Exploited Vulnerabilitydue 2024-05-01
Exploited in the wild
EPSS
19.43%
97.1th percentile
A vulnerability in a legacy capability that allowed for the preloading of VPN clients and plug-ins and that has been available in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, local attacker to execute arbitrary code with root-level privileges. Administrator-level privileges are required to exploit this vulnerability. This vulnerability is due to improper validation of a file when it is read from system flash memory. An attacker could exploit this vulnerability by copying a crafted file to the disk0: file system of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the affected device after the next reload of the device, which could alter system behavior. Because the injected code could persist across device reboots, Cisco has raised the Security Impact Rating (SIR) of this advisory from Medium to High.

Affected

535 ranges· showing 25
VendorProductVersion rangeFixed in
ciscoadaptive_security_appliance_and_firepower_threat_defense
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software
ciscoadaptive_security_appliance_software

Detection & IOCsextracted from sources · hover to see the quote

pathdisk0:
  • Monitor Cisco ASA/FTD disk0: file system for unexpected or crafted files placed by authenticated users, especially administrator-level accounts, as exploitation requires copying a malicious file to this location.
  • Hunt for Line Dancer in-memory shellcode loader on Cisco ASA devices; it executes arbitrary commands in-memory to avoid leaving forensic traces.
  • Investigate Cisco ASA devices for unexpected reboots or unusual outgoing network traffic as indicators of compromise associated with ArcaneDoor/CVE-2024-20359.
  • Attribute suspicious activity on Cisco ASA/FTD devices to threat actor UAT4356 (also tracked as STORM-1849 by Microsoft), active since at least July 2023 in development/testing and November 2023 in infrastructure setup.
  • ·Exploitation requires the attacker to already have administrator-level privileges on the device; this is not an unauthenticated remote exploit for CVE-2024-20359 specifically.
  • ·The malicious payload persists across device reboots because the injected code survives reloads, elevating the Security Impact Rating from Medium to High.
  • ·CVE-2024-20359 is triggered after the next device reload; arbitrary code execution does not occur immediately upon file placement but requires a subsequent reboot.

CVSS provenance

nvdv3.16.0MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
vulncheck6.0MEDIUM
cisa6.0MEDIUM
vendor_cisco6.0MEDIUM
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