Loading vulnerability…
CVE-2018-13383 is a post-authentication heap-based buffer overflow in the SSL VPN WebVPN portal of Fortinet FortiOS and FortiProxy. While proxying a webpage, the WebVPN JavaScript parser copies JavaScript href-related data using an input-controlled length into a fixed 0x2000-byte heap buffer without adequate bounds checking. An authenticated attacker can cause the appliance to proxy attacker-controlled web content containing oversized JavaScript data, corrupting adjacent heap objects. Affected versions include FortiOS 6.0.0 through 6.0.4, 5.6.0 through 5.6.10, 5.4.0 through 5.4.12, and 5.2.14 and earlier, as well as FortiProxy 2.0.0 and 1.2.8 and earlier.
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.
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.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Fortinet FortiGate SSL VPN remote code execution vulnerability allowing an authenticated user to execute code on the VPN server.
A post-authentication heap overflow in FortiGate SSL VPN's WebVPN JavaScript parsing, caused by copying an unbounded JavaScript buffer into a fixed 0x2000-byte buffer. The article demonstrates chaining it with CVE-2018-13379 to obtain authentication and achieve remote code execution via a forged SSL structure and ROP chain.
A post-authentication heap overflow in FortiGate SSL VPN WebVPN JavaScript parsing. Combined with CVE-2018-13379 to steal credentials/session information, the researchers demonstrated reliable remote code execution by overwriting an OpenSSL SSL structure and redirecting execution through a forged function pointer and ROP chain.
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.