SSD Advisory – Firefox JavaScript Type Confusion RCE

Vulnerabilities Summary
A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write, which leads to remote code execution inside the sandboxed content process when triggered.

Vendor Response
The reported security vulnerability was fixed in Firefox 62.0.3 and Firefox ESR 60.2.2.

CVE
CVE-2018-12386

Credit
Independent security researchers, Niklas Baumstark, Samuel Groß and Bruno Keith, had reported this vulnerability to Beyond Security’s SecuriTeam Secure Disclosure program.
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SSD Advisory – Firefox Information Leak

Vulnerabilities Summary
A vulnerability where the JavaScript JIT compiler inlines Array.prototype.push with multiple arguments that results in the stack pointer being off by 8 bytes after a bailout. This leaks a memory address to the calling function which can be used as part of an exploit inside the sandboxed content process.

Vendor Response
The security vulnerability was fixed in Firefox 62.0.3 and Firefox ESR 60.2.2

CVE
CVE-2018-12387

Credit
Independent security researchers, Bruno Keith and Niklas Baumstark, have reported this vulnerability to Beyond Security’s SecuriTeam Secure Disclosure program.
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Hack2Win eXtreme

Hack2Win is a hacking competition we launched 5 years ago.

The competition had so far two flavors – Hack2Win Online and Hack2Win CodeBlue.

We decided to go big this year and with Hack2Win eXtreme!

Hack2Win eXtreme will focus on two primary targets, browsers and mobile.

We have up to $500,000 USD to give away!

The competition will take place during the beVX conference, on September 20-21, 2018.

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