(Pwn2Own) Mozilla Firefox Array.slice Out-Of-Bounds Write Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the implementation of Array.slice when executed within JIT compiled code. By performing actions in JavaScript, an attacker can trigger a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process.
Additional Details
Mozilla has issued an update to correct this vulnerability. More details can be found at:
https://www.mozilla.org/en-US/security/advisories/mfsa2019-09/#CVE-2019-9810
Disclosure Timeline
- 2019-03-21 - Vulnerability reported to vendor
- 2019-04-15 - Coordinated public release of advisory
- 2019-06-14 - Advisory Updated
Credit
fluoroacetate (@fluoroacetate)
