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CVE-2024-20359 is a persistent local code execution vulnerability in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software. The flaw affects a legacy capability used to preload VPN clients and plug-ins. It is caused by improper validation of a file read from system flash memory. An authenticated local attacker with administrator-level privileges can exploit the issue by placing a crafted file in the device flash storage so that it is processed during the next device reload. Reported analysis indicates the boot process can search for specially named client bundle archives in flash storage, unpack them, and execute embedded Lua configuration logic, enabling attacker-controlled code execution. Successful exploitation results in arbitrary code execution with root privileges and can persist across reboots, allowing long-term modification of device behavior and malware implantation.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
27 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Cisco ASA zero-day vulnerability referenced as part of the 2024 ArcaneDoor campaign and used to deploy malware on targeted devices.
A zero-day vulnerability in Cisco devices exploited as part of the ArcaneDoor campaign to breach government networks.
A vulnerability in Cisco Adaptive Security Appliance allowing arbitrary code execution.
A zero-day vulnerability in Cisco ASA and FTD software exploited as part of the ArcaneDoor campaign to breach government networks.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.