Information Disclosure in Cisco ASA and FTD Web Services Interface
CVE-2020-3259 is an information disclosure vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software. The flaw is caused by a buffer tracking issue when the software parses invalid URLs requested from the web services interface. A remote, unauthenticated attacker can exploit the issue by sending a crafted HTTP GET request containing an invalid URL to the exposed web services interface. Successful exploitation can cause the affected device to return portions of process memory, potentially exposing sensitive information resident in memory. Cisco notes the issue affects only specific AnyConnect and WebVPN configurations.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Cisco information disclosure vulnerability used alongside other Cisco ASA/FTD access methods in Akira intrusion activity.
A vulnerability in Cisco devices that the Akira ransomware group has been observed exploiting for access.
A vulnerability in Cisco VPN software that has been exploited by ransomware groups such as Akira to gain initial access to victim networks.
A Cisco ASA/FTD vulnerability described as enabling arbitrary code execution, leveraged by Akira affiliates after initial access (post-AnyConnect SSL VPN compromise).
The version that knows your environment.
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.