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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 during parsing of invalid URLs requested from the web services interface. By sending a crafted HTTP GET request containing an invalid URL, an unauthenticated remote attacker can cause the affected device to return portions of memory contents. Exposed memory may include sensitive information present in process memory, and the issue affects only specific AnyConnect and WebVPN configurations.
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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.
12 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 Cisco ASA information disclosure vulnerability listed among the vulnerabilities exploited by Akira.
A vulnerability in Cisco devices that the Akira ransomware group has been observed exploiting for access.
A Cisco ASA memory disclosure vulnerability that can expose credentials without authentication and is described as part of Akira initial access tradecraft.
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.