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CVE-2020-9850 is an improper behavioral-workflow enforcement (logic) vulnerability in WebKitGTK and WPE WebKit before version 2.28.3. Insufficient restrictions in WebKit processing can allow a remote attacker to cause arbitrary code execution.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit module: 'Safari in Operator Side Effect Exploit' (modules/exploits/osx/browser/safari_in_operator_side_effect.rb). The module targets multiple vulnerabilities in Apple Safari and macOS (CVE-2020-9850, CVE-2020-9856, CVE-2020-9801) to achieve arbitrary code execution on a victim's Mac. The exploit leverages a type confusion in Safari's JavaScript engine (triggered via the 'in' operator and PDF plugin), then chains a heap overflow in the CVM Server and a sandbox escape to run a payload as the user outside of Safari's sandbox. The module serves a malicious web page to the victim, who must visit it with a vulnerable Safari browser. The exploit supports multiple payload types, with the default being a Meterpreter reverse shell. The only fingerprintable endpoint is the file path '/var/db/CVMS', where the payload is dropped on the target. The code is written in Ruby (Metasploit module) and JavaScript (browser exploit). This is a weaponized, operational exploit suitable for real-world attacks, provided the target is vulnerable.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
WebKitGTK logic flaw that may permit arbitrary code execution.
A remote arbitrary-code-execution vulnerability caused by a logic issue (CWE-841, improper enforcement of behavioral workflow) in WebKitGTK and WPE WebKit prior to version 2.28.3.
A logic flaw in WebKitGTK and WPE WebKit that could allow a remote attacker to achieve arbitrary code execution. It affects versions before 2.28.3.
A logic vulnerability in WebKitGTK and WPE WebKit that may enable remote arbitrary code execution.
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.